First, I’m an Avast user and not an Avast Team member.
If you have only been using the link in the Alert window.
You could try the location to report both a False Positive and or a False Negative (for File or URL) - Choose Your Sample Submission Type | Avast
- You won’t get a direct response but it should be analysed within 48 hours, if found to be false it will be removed. If it hasn’t been remove it must still be considered suspect
There are sites that can also check a site link and or file upload.
Edit: It isn’t wise to post an active link to the suspect location. That said I have used it to report as a possible FP.