What do you have going on? Strut assemblies are known to have issues holding the spring. Never heard of a shock itself crack unless it was loose.
Back in my 4X4 days we busted shocks all the time, with the strut system in most cars there is just more to break, I have seen them twisted, bent sideways, blown seals and sheared off at the mounting bolts both top and bottom, so yes it is a possabality.
Especially if your beating the crap out of it!
Looking for a Used Malibu in your area?
CarGurus has 80,728 nationwide Malibu listings starting at $2,495.
Search Chevrolet Malibu Questions
Chevrolet Malibu Experts