Best PDF Password Cracker?

[IAMZOMBIE]

I've downloaded probably 5 different trial PDF crackers, and so far I'm not impressed. It seems the best of them works via brute force.
Does anyone have any first hand recommendations?



Thanks

[floyd]

the best of them works via brute force.

And the worst?

What do you expect? As long there is no exploit there is no better way than brute forcing or use a wordlist... have you tried pdfcrack? It's in the ubuntu reps

[IAMZOMBIE]

As long there is no exploit there is no better way than brute forcing or use a wordlist...

Good point. I guess it's not the end of the world. I'm just used to instant cracks, lol.

have you tried pdfcrack? It's in the ubuntu reps

I'll give it a shot, thanks.

[imported_-$p!c3-]

Hey, quite an interesting topic here. When considering to find "the best" PDF password cracker, did you take into account that other operating systems exist? As for Win*-Systems I really can recommend the ElcomSoft APDFPR (as mentioned by williamc).

But how about Linux? I haven´t found a tool for this OS that nearly reaches the speed of APDFPR (yet).
If you discovered a program that is cross-platform compatible, please let us know.

-$p!c3-

[thorin]

I'm not sure how you define "best" but screen shots and OCR seem pretty easy.

Guess the means kind of depend on the input and end goal.

[IAMZOMBIE]

I'm not sure how you define "best" but screen shots and OCR seem pretty easy.

Guess the means kind of depend on the input and end goal.

My bad, I wasn't clear in my question. I'm looking for software to break password protected PDF documents, not software to make PDF documents. Said document was made with Adobe Acrobat 7 with RC4 Encryption.

I ended up forking over $80 and I bought 'Passware Password Recovery Kit'. It's been brute forcing for 10 hours and no dice yet. We'll see. I'm going to let it run over the weekend and see if it can get it.

By 'best', I would love something that could crack it instantly. I've cracked quickbooks files before where it was instant. That would be nice. None of the demos I tried could do it though...

[thorin]

What about installing PDFCreator and "printing" it to a PDF which has no password?

[IAMZOMBIE]

What about installing PDFCreator and "printing" it to a PDF which has no password?

Thing is, it's the 'open' password that's the problem. Double-Click the pdf and it's asks for a password.
I've been bruteforcing it since Friday. Still no dice. The user thinks the password was all numbers, no symbols, so I started another bruteforce against it today with the length set at 0-6 characters(numbers) which ran pretty quick. Now doing length 7-8 which is taking all day. I ran all ???-??-???? conbinations over the weekend which the user thought it could also be. Ugggg.

I guess it's good to know that adobe actually got something right, for once, with security.

[thorin]

Oh ok, sry Zombie! I wasn't even aware that you could PW protect simply the viewing or opening of a PDF.