def check_checksum_mismatch(self):
        ''' Checking for a checksum that doesn't match the generated checksum '''
        if self.pefile_handle.OPTIONAL_HEADER:
            if self.pefile_handle.OPTIONAL_HEADER.CheckSum != self.pefile_handle.generate_checksum():
                return {'description': 'Reported Checksum does not match actual checksum', 
                        'severity': 2, 'category': 'MALFORMED'}
        return None
Checking for a checksum that doesn't match the generated checksum