$1,000 FR: I'm confused about this JJ hand

[wpr101]

Villian is 100% unknown. I guess there are two ways we can look at the river. He could have a stronger overpair or a flush. It seems unlikely he has a boat as there are two pairs on the board. But, it also looks like my hand is weak, possibly AQ/AK or maybe random junk/small pair. The river call seems standard, no?

PokerStars No-Limit Hold'em, $10 BB (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

BB ($1656.25)
UTG ($1055)
UTG+1 ($965)
MP1 ($1000)
MP2 ($2351)
CO ($1123.50)
wpr101 ($985)
SB ($1215)

Preflop: wpr101 is Button with J[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/heart.gif[/img].
<font color="#666666">4 folds</font>, <font color="#CC3333">CO raises to $30</font>, <font color="#CC3333">wpr101 raises to $100</font>, <font color="#666666">2 folds</font>, CO calls $70.

Flop: ($215) 9[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
CO checks, <font color="#CC3333">wpr101 bets $145</font>, CO calls $145.

Turn: ($505) 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
CO checks, wpr101 checks.

River: ($505) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">CO bets $300</font>, wpr101 calls $300.

Final Pot: $1105