First, I’m an Avast user and not an Avast Team member.
There are sites that can also check a site link and or file upload.
These can give you an idea who else is detecting it and or why it may be happening.
New 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.
You say you have reported it, if it is still present after that period it is still considered a good detection, which is why the other links may help.