A method, system and apparatus for detecting and preventing content distribution site impersonation. In this regard, a method for detecting and preventing content distribution site spoofing can include the steps of loading a markup language document and a corresponding digital signature for processing and ensuring that the digital signature originates from a pre-specified source of the markup language document incorporated within the markup language document. The method further can include the steps of dynamically computing a hash value for the markup language document and comparing the dynamically computed hash value to a hash value encrypted within the digital signature. Finally, the method can include the step of detecting content distribution site spoofing either if the digital signature does not originate from the pre-specified source, or if the dynamically computed hash value does not match the hash value encrypted within the digital signature.