Unsupported PDF hash

[viperxp]

** If I replace the " 4294967292" with "-1028" so it looks like a valid hash, hashcat actually starts cracking it but can't crack it

Signed value of 4294967292 is -4 (not -1028).

P. S. The same problem was recently discussed here.

Thanks, changed the " 4294967292" to "-4" and successfully cracked the file