
Abdul Haseem Khan scored twice while Aamir Shazad, Abbas Haider Bilgrami, Mohammad Waqas and Mohammad Rizwan scored one goal each.
Waqas opened the scoring through a penalty corner in the 22nd minute at half-time, putting Pakistan in a 1-0 lead at the end of half time.
Goals from Khan, Shazad, Bilgrami and Rizwan early in the second half strengthened Pakistan's position.
South Africa fought back and scored two back to back goals through Timothy Drummond and Lloyd Norris-Jones towards the end of the second half but could not break Pakistan's momentum, who scored once again before full time to make it 6-2 at full time.
Pakistan had been knocked out by Korea in the quarterfinals while hosts Malaysia beat them to fifth place 3-1 on Saturday.
Pakistan must now win the Asia Cup to qualify for the Hockey World Cup in 2014.
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