The long-distance installation package inexplicably appeared in my mobile phone, but I never downloaded it. What happened?

This nine tour is really disgusting. I downloaded it once, and then I received spam messages every day, reminding me that the recharge of Jiuyou was successful or something. Yours should have been downloaded to the installation package before, but it was not installed. Maybe I installed it myself recently. It's like a lot of software is updated in the middle of the night, and I even updated wifi myself. In fact, when I get up in the middle of the night, I