Just come it to my mind. is it possible? to get hook into your wallet and send some to another wallet? 
I don't know if you have seen but last months i have seen that many people were infected by a virus or malware which when people wanted to make a transaction the pasted address was always the hackers address so people were sending accidentally money to the hacker.
And for the OP I must say that of course it's possible to hack your own wallet but who do you think will compensate the stolen funds?