Is there any danger in pulling a washing machine forward?
A washing machine should have 


One detachable flexible cold water feed of indeterminate length.
One detachable flexible hot water feed of indeterminate length.
One possibly detachable flexible drain line of indeterminate length.
One permanently attached electrical cord of indeterminate length.




So the problem you have now is figuring out how long each of these are,and how to disconnect them. It sounds like you don't have much access to the back of the machine to get a good look, so a mirror attached to a telescoping handle might come in handy here.



Once you get a better idea of what's behind the machine, you'll have a better understanding of how to move it.