Bundlore adware / malware

I have an app that is exclusively distributed through the Mac App Store. Since my last app update a couple of days ago I've had two users reporting that AVG / Avast anti-virus flags my app as being infected by Bundlore adware. Would this even be possible for apps distributed through the Mac App Store? Does anyone have any tips on how to proceed in this situation?


The app was built and submitted on a machine running 10.14.3. This machine does not appear to be infected, but I don't have any anti-virus software running on it.