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Offlines240779
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Breaking secured PDF documents
    #19345147 - 12/30/13 06:15 AM (10 years, 1 month ago)

A bit of research has told me that I'm looking for something that can remove the owner password of PDF documents. Indeed, I have found a website that hosts an online tool as well as a freeware program, both of which only do one at a time. Now I'm after a program that can work with a batch of PDF files. I have found some, but none of them are free and they're all on these glossed over websites that look like copies of each other. It's like there's a subculture of PDF password removers. :rolleyes: Any recommendations?


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Invisiblekoraks
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Re: Breaking secured PDF documents [Re: s240779]
    #19345151 - 12/30/13 06:17 AM (10 years, 1 month ago)

Can't you script something using the freeware standalone tool? Can it be used from the command line?


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Re: Breaking secured PDF documents [Re: koraks]
    #19345203 - 12/30/13 06:34 AM (10 years, 1 month ago)

I don't think so. Unfamiliar territory for me too.


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Invisiblekoraks
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Re: Breaking secured PDF documents [Re: s240779]
    #19345222 - 12/30/13 06:44 AM (10 years, 1 month ago)



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Invisibledeadwk
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Re: Breaking secured PDF documents [Re: koraks]
    #19349745 - 12/31/13 02:55 AM (10 years, 1 month ago)

Script kiddie, don't even know how to bruteforce :lolwut:
Use a script that bruteforces, Linux has tons of them.


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Re: Breaking secured PDF documents [Re: koraks]
    #19349754 - 12/31/13 03:01 AM (10 years, 1 month ago)

Thank you, koraks! Very generous of you. I've bookmarked stuff and will look further into it.

thedeadwalkk, I think I read that what I'm looking for is different from brute forcing. What I've been doing with the sites I mentioned is basically breaking the PDFs.

Also, I have no idea how to even begin doing what you stated, but I'm curious how to learn how to do that kind of stuff. I want to advance my computing. Any reccommendations on how to do such? I know makeuseof.com has a lot of free how-to ebooks, so that's a start...

Any idea why there are multitudes of PDF applications that all look like they're owned by the same company and just given recycled names? I've seen this type of behavior before with other programs, I think.


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Invisibledeadwk
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Re: Breaking secured PDF documents [Re: s240779]
    #19349769 - 12/31/13 03:12 AM (10 years, 1 month ago)

What you're saying just sounds like password protected PDFs. You can use a bruteforce tool which repeatedly tries all combinations of punctuation, etc.. in hopes of finding the right one.


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Re: Breaking secured PDF documents [Re: deadwk]
    #19349777 - 12/31/13 03:15 AM (10 years, 1 month ago)

I read that it can take weeks. The stuff I've been using takes seconds and I read that the programs I've been using are simply removing the lock, not picking it, so to speak.


Source: http://pcsupport.about.com/od/toolsofthetrade/tp/pdf-password-remover.htm


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Invisibledeadwk
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Re: Breaking secured PDF documents [Re: deadwk]
    #19349783 - 12/31/13 03:18 AM (10 years, 1 month ago)

Depends, if you have a really good password list you can crack shit really easy.

If you're limiting yourself to free tools, you might have a hard time doing this on autopilot and doing lots of them at a single time. I'd suggest looking at linux scripts, you'll probably find them quite easily. If you're limiting yourself to windows you'll have a harder time.


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Re: Breaking secured PDF documents [Re: deadwk]
    #19349794 - 12/31/13 03:25 AM (10 years, 1 month ago)

I feel like I need to get educated about linux (and other alternatives to Microsoft). Seems like it's what you need to do to have full control over your computing.

By the way, I don't necessarily have anything against a paid program, but the glossed over cookie cutter websites that hose the programs are suspicious. If you scroll through the comments on the following page, you'll see many commentors posting different brands of PDF password removers. Weirded me out.


http://answers.oreilly.com/topic/5451-how-do-i-unlock-a-pdf-document-remove-pdf-restrictions/


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Re: Breaking secured PDF documents [Re: s240779]
    #19441470 - 01/19/14 07:48 AM (10 years, 12 days ago)

Well, I ended up going with a copy of SoftSpire PDF Unlock & Lock ($9). I had initiated the purchase of a few others, and each of them forced something extra in my online shopping cart on the checkout screen, that was not removable  :cuckoo:

So far, in my experience with SoftSpire PDF Unlock & Lock, it does exactly what it advertises. Mass breaks PDF documents, a process which would have taken a lot longer had I insisted on using the freeware.


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