What is url:mal should i remove it ?

Hi all I am currently getting blocked from accessing a site that i use regularly. I’m getting popup that avast saying the site is infacted with url:mal. is that a threat or a false flag ?

URL:Mal = Blacklisted URL or IP

with url:mal. is that a threat or a [b]false flag ?[/b]
Impossible to answer since you don't tell us what website .....