@Hyolobrika @ZySoua more precisely, there is no someone adding fedi instances. At least, I'm not aware of this.
Malware databases are often poorly maintained and they rarely follow up on sites they listed. So, you could totally end up with a blacklisted IP address when you buy a VPS. Shit happens.
The moral of the story is, don't use antiviruses. They suck a bag of dicks anyway and are a malware in and of themselves