This is the standard UMNO hand sign besides the "open palm on top of the clenched fist" hand sign that all senior UMNO leaders use to show their ketuanan and manliness. The wanita umno women love these hand signs.
Look at the clenched fist properly and you can just about make out six fingers. The picture was photoshopped.
Anonymous 10.08, I can see only 4 knuckles to indicate 4 fingers excluding the thumb. No photoshop here, only pure mischief as captured by the camera.