Sri Lanka - whom Moody has been coach of since 2005 - made 296-9 off 50 overs while Pakistan could only muster 181 all out off 42.5 overs.
Pakistan - who crashed out of the World Cup in the first stage and whose coach Bob Woolmer died mysteriously shortly after they were sensationally beaten by minnows Ireland - still won the series 2-1.
Sri Lanka's innings was based round a 124 run partnership between skipper Mahela Jayawardene - who made 83 - and Chamara Silva (64) until Jayawardene was bowled by Mohammed Hafeez with the score on 225.
Pakistan - who arrived for the series without a new coach and with a new captain in Shoaib Malik - had the upper hand before that thanks to Ifthikar Anjum skittling out the top three Sri Lankan batsmen - including veteran opener Sanath Jayasuriya for 19 - to leave them in trouble at 101-3.
The Pakistanis, however, never got any momentum going in their innings with just Shoaib producing any resistance of note as he stroked a superb unbeaten captain's