In the second match of the day at the Azlan Shah Stadium, Australia scored through Dylan Wotherspoon (17th minute), Jamie Dwyer (24th minute) and Jeremy Hayward (28th) to maintain their clean slate in the tournament and become the first team to secure a place in Sunday's summit clash.
The lone goal for the Black Sticks came in the 32nd minute from a penalty stroke which was converted by Andy Hayward.
Korea took the lead in the third minute through Lee Jung Jun (3rd) before Lee Namyong (29th) and Kim Youngjin (35th) scored two goals.
Malaysia's goals came from penalty corner conversions by Faizal Saari (32nd) and skipper Razie Rahim (34th).
The win kept Korea in the race for the summit clash but they will now have to beat New Zealand in their last league match on Sunday to progress to the final.
