Kiwi Josh Geary, who played with Murray in the final pairing, managed to push the Australian towards the end but ultimately couldn't make up the ground he needed, finishing in a tie for second with Australian Ashley Hall at 19-under.
The 34-year-old was disappointed but took the positives from what he says is a transitional point in his career.
"It is my first event for three months and it came with a lot of changes to the swing over the last six months," he said after his round. "Overall I am really happy with the week. It was a shame I lost a bit of momentum today.
"Overall my game is very close. My putting came back to how it was this week and overall my game is back."
The top-ranked New Zealander in the field Ryan Fox finished strong with a five-under 67 but was made to rue a disappointing day three that left him too far behind the leaders to finish six behind Murray.
"You take nine holes out yesterday afternoon and it was a pretty good week," he said. "Obviously the scoring is red hot again today and nine holes took me out of the tournament really. But the rest of it I played a lot of good golf. I felt like I had a chance and as I said was just not quite there yesterday."
Harry Bateman and Steven Alker were the other New Zealanders who came close, both finishing at 16-under to finish in a tie for fifth.