You have no idea what UTG has regardless of his stats! Sure he could have total garbage here but you want to get called by total garbage. An Ace or King will not come on the flop most of the time, and some of the times that it does it won't connect with your opponents, and other times it will but you will also make a set.
Don't be scared money: raise it up here to like $5.50 or $6 and reevaluate the flop.