n medium animal 

Perception +7; low-light vision

Skills Acrobatics +7, Athletics +5, Stealth +7, Survival +7

Str +2 Dex +4 Con +1 Int -4 Wis +2 Cha -2

AC  15; Fort +6, Ref +9, Will +5

HP 24

Speed 35 feet

Melee [>] jaws +9, Damage 1d6 + 2 piercing plus Knockdown

Knockdown [>] When the wolf hits with its jaws Strike, it can use this action immediately after to automatically knock over the target, giving it the prone condition.

Pack Attack If the wolf Strikes a target that at least two of the wolf's allies could reach with a melee attack, the wolf deals 1d4 extra damage on that Strike.

Beginner Box, page 80. Reprinted in TiO.