7. The system of claim 1 , wherein the parser examines the one or more portions of the PDF document by at least: examining one or more of a header section, a body section, a trailer section, or a cross-reference table section of the PDF document; and providing the PDF document to the one or more virtual machines to verify the inclusion of malicious network content in the PDF document when one or more of the body section, the header section, the trailer section or the cross-reference table section of the PDF document is determined to include one or more suspicious characteristics indicative of malicious network content.
7. The system of claim 1 , wherein the parser examines the one or more portions of the PDF document by at least: examining one or more of a header section, a body section, a trailer section, or a cross-reference table section of the PDF document; and providing the PDF document to the one or more virtual machines to verify the inclusion of malicious network content in the PDF document when one or more of the body section, the header section, the trailer section or the cross-reference table section of the PDF document is determined to include one or more suspicious characteristics indicative of malicious network content. 9. The system of claim 7 , wherein the cross-reference table of the PDF document includes offset information indicative of a portion of objects within content of the PDF document.