Patent ID: 8281398

Claim:
One or more computer-readable storage media not consisting of a signal, the one or more computer-readable storage media comprising computer-executable instructions for protecting against malware, the computer-executable instructions directed to steps comprising: identifying a potential presence of malicious computer-executable instructions in a structured document file that represents a user-viewable document, and that comprises at least two structured document file records that each have a relative position with respect to other structured document file records within the structured document file, wherein each of the at least two structured document file records comprises at least two structured document file sectors that each have a relative position with respect to other structured document file sectors within a same structured document file record; modifying, in response to the identifying, at least one of the relative position of at least one structured document file record or the relative position of at least one structured document file sector so as to disrupt execution of the identified potentially present malicious computer-executable instructions; and verifying a semantical correctness of the structured document file after the modifying.