IL:Trojan.MSILZilla.21341 False positive or real?

Hello. I received a file from a WIP game project consisting of some exe and other scripts.

Bitdefender flags it as infected with ith IL:Trojan.MSILZilla.21341

Does anyone know anything about it? Also their project website was marked as suspicious.

The developer says its because of some encrypted file with a digital signature Sha-1 Class 3

Does anyone have an opinon on this?

Thanks !