I spent part of the day converting the Groaning Spirit (from Tome of Horrors revised edition) from 3.5 rules to PFRPG.
Here's what I ended up with:
Groaning Spirit CR 7 (3,200 XP)
CE Medium undead (Incorporeal)
Init +7; Senses darkvision 60 ft.; sense living (5 miles); Perception +15; sense living
Aura Fear (DC 17), Unnatural (30 ft.)
DEFENSE
AC 17, touch 17, flat-footed 14; (+3 Dex, +5 deflection)
hp 56 (7d8+28)
Fort +2, Ref +5, Will +8
Defensive Abilities incorporeal, channel resistance +4
Immune undead traits
Weaknesses vulnerability
OFFENSE
Spd fly 30 ft.
Melee incorporeal touch +6 (1d8 plus chill touch)
Special Attacks chill touch, keening
STATISTICS
Str –, Dex 17, Con –, Int 16, Wis 16, Cha18
Base Atk +5; CMB +5; CMD 18
Feats Ability Focus (keening), Alertness, Blind- Fight, Improved Initiative
Skills Bluff +14, Fly +15, Stealth +13, Intimidate +14, Sense Motive +13
Languages Common, Elven
ECOLOGY
Environment any
Organization solitary
Treasure standard
Please let me know if I should change anything.