Iran will face either Oman or China in the semifinals on Saturday.
Mahdi Mirjalili (two goals), Moslem Mesigar (two goals), Mohammad Moradi, Abbas Rezaei, Ali Mirshekari, Amir Hossein Akbari, Mohammad Ali Mokhtari and Abdulla Alabdulla (own goal) scored for Iran.
Team Melli had previously defeated Uzbekistan and the UAE in the competition.
The tournament is taking place in Pattaya, Thailand from March 16 to 26.