Did some searching on >>1413485 and found this. I don't think it's a direct one to one connection with the jpg hash code, but it does seem interesting even though I am not quite sure what it is. Smarter brains than mine are required. Looks like the language is Korean which also piques my interest.

https://www.cisco.com/c/dam/en/us/td/docs/security/firepower/command_ref/b_Command_Reference_for_Firepower_Threat_Defense-ko_KR.pdf