Felipe Valério put Brazil in front with two minutes into the game before Neguinho scored twice in quick succession as Brazil got off to commanding lead early on in the first half.
Iran failed to capitalize on a much-improved performance after the break as Vahid Shamsaei’s young and new-look team suffered a second defeat against the futsal powerhouse in four days.
Iran began its campaign with a 5-2 loss against Brazil on Thursday, but went on to rout Greenland 11-2 before edging out Afghanistan 4-3 to set up a rematch with the Selecao in the final.