Is villain to passive to call the river?

[Laetus]

Villain is playing 22/6/2,5 and I'm playing TAG. We haven't tangled. Do you believe villain is betting w/ missed draw often enough?

EverestPoker Game #1968083669: Table Bamako-16 - $2.00/$4.00 - No Limit Hold'em - 15:41:38 - 2007/08/21
Seat 1: matiouz_ ($380.50)
Seat 2: Pummlff ($378.30)
Seat 3: NOreturn ($743.28)
Seat 4: HERO ($394.00)
Seat 5: Luigi38 ($53.60)
Seat 6: 405antonio ($270.20)
matiouz_ posts the small blind of $2.00
Pummlff posts the big blind of $4.00
The button is in seat #6
*** HOLE CARDS ***
Dealt to HERO[9d Td]
NOreturn folds
HERO raises to $14.00
Luigi38 folds
405antonio folds
matiouz_ folds
Pummlff calls $10.00
*** FLOP *** [4h Qs Th]
Pummlff checks
HERO bets $23.00
Pummlff calls $23.00
*** TURN *** [4h Qs Th] [3d]
Pummlff checks
HERO checks
*** RIVER *** [4h Qs Th 3d] [7d]
Pummlff bets $48.00
HERO ?