Are you jailbroken?
Sounds like someone was rick rolling you as you likely didn't follow the strong advice to change your root password immediately after jailbreaking.
Pictures!
Who knows what else the person did. Might want to restore.
Wow, I'm glad I stopped jailbreaking 😱 I always knew the iPhone is exposed and vulnerable when jailbreaking, but to me, that was always just a small risk that was ignored. After seeing that article though.... smh