QF41 departs SYD at 13.50, arrives in CGK at 18.35.
MH724 departs CGK at 19.45 and arrives into KUL at 22.45

If you can get the QF flight on points, the MH flight is around $225 (Expedia).

Expedia are also selling the QF/MH combination at around $1162. They seem happy that the 70 minutes connection is do-able.