office2hashcat.py strange output

[obdnanr]

I'm working with a 97-2003 office document and when I run the office2hashcat.py I get a something I'm not sure what to do with.

XOR obfuscation detected, Password Verifier : 18e787d1 (made up numbers, but it's the same length as the output)

Can anyone tell me what's going on here?

Thanks