The 20-year-old moved to the top of the leaderboard when Lauri Joona picked up a puncture on Friday morning and led the all-Ford Fiesta Rally3 field all the way to the finish..
Pajari ended the penultimate day over a minute clear despite nursing a rear differential issue during the afternoon. He then more than doubled that advantage on Sunday as Joona backed off in wet conditions.
The Finn arrived at the finish 2min 15.7sec clear of his compatriot and extended his championship lead to 26 points in the process.