Malicious apps hide themselves after installation and aggressively display full-screen advertisements. 25 Android Package Kits, mostly masquerading as a photo utility app and a fashion app, were published under 22 different developer accounts. These 25 malicious hidden apps share a similar code structure and app content, leading us to believe that the developers may be part of the same organizational group or, at the very least, are using the same source code base. We reported these apps to Google on September 2, 2019, and they were removed from the store.”]
Source: https://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/hidden-adware-google-play