Sao Paulo, Brazil (SportsNetwork.com) - Peter Malnati used a big finish to fire a 5-under 66 in Sunday's final round and he went on to win by four shots at the Brasil Champions.

Malnati, who concluded his third round earlier on Sunday and was tied for the lead with Tyler Duncan to start round four, finished the week at 22-under-par 262. The win is Malnati's second on the Web.com Tour, with his first one coming at the 2013 News Sentinel Open.

"This is a big win. This is a big event. That's the best kind of stress ever," Malnati said. "That's so much fun but it really is stressful. I don't know the math but this is one of our biggest purses and it doesn't guarantee me of anything, it does help a lot to get back to the PGA Tour and that's been my goal from the start."

Seven players finished runner-up and four shots behind Malnati, including John Mallinger, who tied Malnati for the lead before slipping a little bit late at Sao Paulo Golf Club.

Mallinger carded a 5-under 66 and ended tied for second with Henrik Norlander (64), Julian Etulain (64), Timothy Madigan (66), Matt Davidson (68), Abraham Ancer (69) and Duncan (70) at 18-under 266.

Malnati did not get off to a great start in his final round as he tripped to a bogey at the first, which gave Duncan the outright lead at the time. However, Malnati was able to pick up a lot of shots throughout his round, while Duncan could not quite get over the hump.

"It's not the most nerve-wracking tee shot ever," Malnati said about the first hole. "You should be able to bump a 3-iron up there but that was ugly. Obviously I was a little rattled but I knew if I could stay calm I'd be OK."

After a par at the second, Malnati ran off four straight birdies from No. 3 to take the outright lead once again. A bogey at seven dropped Malnati back a shot and he was briefly tied for the lead with Duncan, but a double-bogey at seven put Duncan back two shots and he never really recovered.

Malnati continued to hang strong as he got a shot back two holes later with a birdie on nine, getting him to 3-under on the round and up to minus-20 for the week.

Following a trio of pars from 10, Malnati moved his advantage to three shots with a birdie on No. 13 and it appeared as if he was going to run away with the tournament.

However, with a number of players sitting at minus-18, Malnati dropped back to 20-under with a bogey on 14. Then Mallinger emerged.

Mallinger, who had started his round with seven birdies and two bogeys through his first 12 holes, went on to make his eighth gain on No. 17 after four straight pars from 13.

Paired with Malnati's second straight bogey on 15, Mallinger's birdie on the par-5 17th all of a sudden had him tied for the lead with Malnati.

Malnati came through in the clutch when it mattered most, however, as a birdie on 16 paired with a Mallinger bogey at the last gave Malnati a 2-shot lead once again.

With nobody else moving any closer than 18-under, Malnati cruised to the finish with two more birdies on 17 and 18, making it three straight gains to close out his round, giving him a 4-shot win.

NOTES: In three events prior to this tournament this season, Malnati missed the cut once and his best finish was a tie for 40th at the Panama Claro Championship ... Malnati played his 2014 season as a rookie on the PGA Tour, where he missed all but five cuts in 18 starts ... With the win, Malnati earned $153,000 ... The Web.com Tour moves to Chile next week for the Chile Classic, where Adam Hadwin won last year.