I think he is a NM in Pakistan. He subscribed August 26 on chess.com so perhaps his rating is not yet entirely accurate.
As for loosing a blitz game online, that can happen to a National Master, especially if he is not quite used to play online. They are not invincible, you know. ;)
I would have been more surpised if you had claimed a victory over an IM or GM though.
I just played this blitz game and was stunned to see he was a NM who was rated at around my nooby level. I would think he couldn't be a NM but it was in red, which I believe means it has been verified?
If he is then I apologise but I'd like some people to weigh in here, fake or what?