n medium animal 

Perception +7; darkvision

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

Str +2 Dex +4 Con +1 Int -5 Wis +2 Cha -4

AC  17; Fort +6, Ref +9, Will +5

HP 16

Speed 25 feet, climb 25 feet

Melee [>] fangs +9 (finesse), Damage 1d6 + 2 piercing plus giant spider venom

Ranged [>] web +7 (range increment 30 feet), Damage web trap

Descend on a Web (move) The giant spider moves straight down up to 40 feet, suspended by a web line. It can hang from the web or drop off. The distance it Descends on a Web doesn't count for falling damage. A creature can Strike the web, which has AC 20 and 8 HP. If the web is reduced to 0 HP, the spider falls.

Giant Spider Venom (poison) A target damaged by the spider's fangs must succeed at a DC 16 Fortitude save or take 1d12 poison damage and gain the flat-footed condition for 1 round.

Web Trap A creature hit by the giant spider's web Strike gets stuck to the nearest surface. It can't move until it successfully Escapes (DC 17).

Beginner Box, page 78. Reprinted in TiO.