Android/PUP.Riskware.FakeGift is Malwarebytes’ detection name for a potentially unwanted program which spreads among Android users by promising rewards.
The potentially unwanted program is called GiftCashMoney and promises users daily gifts, and rewards for bringing in new users. But when reaching the minimum pay-out amount nothing is paid out.
Android/PUP.Riskware.FakeGift was available on Google Play and spread quickly probably because of the promised rewards.
Malwarebytes for Android protects against Android/PUP.Riskware.FakeGift.
These apps can be uninstalled using the mobile devices uninstall functionality, but these apps can be made available under another name. That is where Malwarebytes for Android can help you, by identifying these apps and removing them.