Internet-Security.com TCP port 9107 details

TCP 9107 is used by the HP JetDirect/AppSocket (PDL Data Stream) raw printing service as an additional queue on some network printers and print servers.
Kyocera ECOSYS and TASKalfa MFPs expose multiple RAW print sockets (9100–9107) in their Command Center RX web UI; 9107 is one of those extra raw queues.
Konica Minolta bizhub devices also provide multiple RAW print ports and can enable ports up to 9107 in their administrator network settings.
Because these are raw printer sockets, attackers sometimes abuse them (including 9107 where present) for PJL/PostScript injection to print arbitrarily or change device settings if the port is exposed without access controls.

TCP 9107