Hold....

[CA BBall Ref]

Dead ball fouls always run the risk of being intentional. Usually very late in the game and the defense is just trying to get the other team to the line so no time runs off. "Contact away from the ball or when not making a legitimate attempt to play the ball, specifically designed to stop or keep the clock from starting, shall be intentional." Personally it sounds like a common foul, not intentional. Use the same judgement when a team is in a foul situation late and trying to kill the clock. Do we call those intentional? Rarely since we know what a team is trying to do. Your judgement sounds just fine in this situation. The defense gained an advantage and was punished accordingly.