Many anti-virus vendors regard "non-professional" web servers (or what would act like a server) a virus.
You can see the "virus" code names, many say HFS is a malicious thing because it is HFS.
Do not be anxious. HFS is free (as in freedom) and open source software. Anyone can check it's source code and do
real safe analytics.
So, never trust those proprietary vendors. The only thing they can do is to cheat people that uses free (libre) software.