I've used Elcomsoft for NTLM cracking. They have a program for PDF with GPU acceleration:
Advanced PDF Password Recovery : Recover PDF passwords and instantly unlock Adobe Acrobat PDF documents
William
Just had a quick google myself and guapdf appears to have CUDA GPU support (40-bit keys only), although the website seems to have DNS issues at the moment. Might be worth a look?
http://www.guapdf.com/
"I do not know with what weapons World War III will be fought, but World War IV will be fought with sticks and stones."
Albert Einstein
I've used Elcomsoft for NTLM cracking. They have a program for PDF with GPU acceleration:
Advanced PDF Password Recovery : Recover PDF passwords and instantly unlock Adobe Acrobat PDF documents
William
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-
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