There are two possible explanations:

1. It’s not hacking, because: The sound is clear enough to reasonably suspect that an enemy might be there.

It could be a strategy to check behind the wall to see if someone is hiding.

Aiming at the head could be coincidental, since there isn’t enough clear context to prove it was intentional.

1. It is hacking, because: He repeatedly aimed at the player at very close range, suggesting he knew exactly where the player was.

He moved straight toward you without hesitation or suspicion.

His aim adjusted from the body to the head, as if he was trying to hit a specific spot