Is it possible to send a push to a device without your app?

Question

Android

Hello. Now I received a push on the samsung galaxy s6 from an application that I don't have. Moreover, it was an advertisement for this application with a call to install it. Moreover, this is not some kind of hyped application, but a simple casual game with 5k downloads.
It seems to me or is it a violation of the laws of nature?)) How can I get a push from a program that does not exist??

Answer 1

Laws are not broken. The push was sent by another installed application.
Make a long click on the notification - app info.