Considering the unlikelyhood of this situation -- you're suggesting that while a legal forward pass is in flight, with an eligible receiver in position to potentially catch the pass, a member of the other team intentionally kicks the pass in flight?
In that situation, I might call this pass interference, and enforce it as such rather than invoking the spot foul provision of an "illegal kick".
As reference, more common acts that count as pass interference could be classified as holding, but you don't call it holding because the action was there to interfere with the pass reception. Alternatively, if a player threw a piece of equipment to deflect the ball in fight, that would probably be unsportsmanlike but I'd also argue that it could be pass interference.