We've seen the examples of kpop fans looking like fools when they said the pic of Krystal in a pool with Kai was a seal when it was actually her. There was Bambam-Mina pic as well that fans went hard to claim its fake but then JYP admitted that it was actually them.
If it's fake, the respective companies will deny it. If they're not saying its fake then maybe it has some truth to it.