I seem to get a lot of these type hands in the BB, and they suck in an unraised pot agaisnt a loose passive. 25 hands is not enough to really get a read on, but if his stats hold up, he could have anything, including a Q or a K.

The way I would play it(not saying it is correct, just the way I normally play it), is exactly like you did, except I would just check/fold the river as well and expect him to show down some pair, possibly even an A/J with a 7 or 2.

All that said, I am open to suggestions as well.