PDF Hash type

[b8vr]

Have a look at the example hashes at https://hashcat.net/wiki/doku.php?id=example_hashes .

In the PDF hashes which hashcat and Jack the Ripper use, the first two numbers are a Version and Revision number. What comes after that — the number of fields, and the length of each field — differs depending on the Version and Revision. Which hashcat hash type ("-m" number) you use also differs.

I suggest you find a hash in example_hashes which matches the beginning of your hash: $pdf$1*2* . Then copy the entire example hash, and compare its structure carefully to the structure of the hashes you have. 

I have noticed that some tools which claim to read a PDF file and generate a hash get the hash wrong. Sometimes there is a clear place to file a bug against the tool, sometimes there is not.

I did that, the most similiar one is PDF 1.1 - 1.3 (Acrobat 2 - 4), collider #2
But its still very different...
PDF 1.1 - 1.3 (Acrobat 2 - 4), collider #2 $pdf$1*2*40*-1*0*16*

Would you mind sharing the hash?