That's the genius of the plan if this was the case. Israel would have to fire at them or admit that Iran was winding them up! Playing a prank. Therefore, Israel wastes expensive missiles on old drones and Iran loses nothing capability wise. Actually wins by seeing the response.

I saw a photo Israel showed of a sophisticated rocket engine (not like those SCUDS). Those are much more difficult to shoot down. It might have been fake propaganda by Israel because it obviously looks like a rocket engine (like SpaceX). I'm not expert here so just a curiosity to me.