Er, I don't know about "evil"... do you only have access to this sculpture? Someone could have put water there just to mess around and think it is funny to confuse people, or the ceiling may have some leaking problems that could have dripped down, even if you cannot see it on the ceiling. The small statue may have held water inside without you knowing? This is a very odd question. If you do not know the story behind it, it may be evil. I do believe in cursed items and satanic beings, so... maybe you should get some help with that somewhere, like a Church and scare the evil spirits away.