Iman Mohebi, Reza Jodeiri (two goals), Esmaeil Arabloo, Shahin Fasihi and Mohsen Farzi were on target for the Iranian team.
Iran has already defeated Italy, the Netherlands and Brazil in the competition.
The Deaflympics had initially been scheduled to take place from December 5 to 21 in 2021, but was postponed due to COVID-19 complications.
There are 209 events in 17 sports on the Deaflympics program.
Athletics, badminton, cycling, golf, judo, karate, orienteering, shooting, swimming, table tennis, taekwondo, tennis, wrestling, basketball, football, handball and volleyball are the 17 sports.
The last summer Deaflympics took place in 2017 in the Turkish city of Samsun.