He is playing his first tournament since suffering serious injuries in a car accident in December 2022 that kept him out of last year's IPL as well as the 50-overs World Cup in India
The win meant Aaron Finch began his stint as T20 captain in style to boost the tourists ahead of the three-match one-day series starting on Tuesday.
Debutants Cameron Boyce, Kane Richardson and Sean Abbott all took wickets in their first overs to restrict Pakistan to 96-9 under the lights. Boyce ended up with two for 10 while stalwart Glenn Maxwell picked up three for 13.
Warner then led the assault on the easily gettable total, reaching his fifty by smashing a switch-hit six. He finished on 53 not out off 39 balls as Australia made their target in 14 overs.