PDF -m 10500, limited to 32 password lenght
#1
I want to crack a PDF with 38 characters password lenght (I know the lenght of the password). I have a dictionary that contains the password. The password hash have the header 4*4*128*-4*1*16, so I have to use -m 10500 to crack this PDF.

When I run the command to crack the password hashcat shows:
Minimum password length supported by kernel: 0
Maximum password length supported by kernel: 32

And fails with this error:
* Device #1: ATTENTION! OpenCL kernel self-test failed.
Your device driver installation is probably broken.
See also: https://hashcat.net/faq/wrongdriver
Aborting session due to kernel self-test failure.
You can use --self-test-disable to override, but do not report related errors.


When I run -m 10700 to crack other PDF hashes, maximum password lenght supported by kernel is 127.

What I can do to crack this PDF? Thank you.
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#2
You need to comply with the error you get.
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