Zabihollah Rahchamani were on target four times and Mohammad Ali Salehipour, Navid Taheri Rad, Mehdi Shahrokhi and Mohammad Reza Saadat scored two goals each for Iran.
Iran has previously defeated Hong Kong 7-2, Indonesia 5-2 and Kazakhstan 12-8 in the Challenger Pool underway in Salalah, Oman.
Team Melli will play Japan on Friday.