In the match held at the Gostaresh Foolad Stadium in Tabriz, northwestern Iran, Mohammad Reza Ghobeishavi opened the scoring in the first minute.
Mohammad Sharifi scored twice in the 18th and 51st minutes.
Mohsen Goudarzi (45th), Erfan Sadeghi (65th) and Mohammad Reza Davari (89th) also were on targets.
Iran had previously defeated Lebanon and India 3-1 and 3-0 respectively in the event.
Eleven group winners and four best second-placed teams (to be announced in due course) will join India in next year’s finals, with the tournament hosts receiving an automatic qualification.
The final tournament also acts as the AFC qualifier for the 2017 FIFA U-17 World Cup in India, with the top four teams qualifying (as India already qualified automatically as hosts, the fifth-placed team also qualify if India finish in the top four).