You could send these exploits [Expl] and Heuristic [Heur] detections for analysis as possible false positives.

Send the sample to avast as a False Positive:
Open the chest and right click on the file and select ‘Submit to virus lab…’ complete the form and submit, the file will be uploaded during the next update.
Periodically check it (scan it in the chest), there should still be a copy in the chest.