Malicious PDF — malware analysis report

Heuristics 14

• media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324
  PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after static deobfuscation)
• Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659
  PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after static deobfuscation)
• Hex-obfuscated scripting name object critical PDF_OBFUSCATED_NAME_OBJECT
  A PDF name object that drives script execution (/JavaScript or /JS) is written with #XX hex escapes to hide it from string-based scanners — e.g. /J#61v#61S#63r#69p#74 decoding to /JavaScript. Legitimate PDF producers always write these names literally; hex-encoding an executable name is a deliberate evasion used by exploit-kit and dropper PDFs.
• PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
  PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
• ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
• ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
  ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
• eval() call high PDF_EVAL
  eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
• JavaScript action low PDF_JAVASCRIPT
  PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
• Embedded JS stream low PDF_JS
  PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
• Embedded file low PDF_EMBEDDED
  PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
• XFA form low PDF_XFA
  PDF uses XML Forms Architecture — can contain script logic
• Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
  The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
• Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
  One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
• Embedded URL info EMBEDDED_URL
  One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
  URL http://www.pdf-repair.com

  • http://www.pdf-repair.com)/Producer(Advanced
  • http://www.pdf-repair.com)/ModDate(D:20100404092506+08
  • http://www.pdf-repair.com)/ModDate(D:20100404093132+08
  • http://www.pdf-repair.com)/ModDate(D:20100404093243+08
  • http://www.pdf-repair.com)/ModDate(D:20100404093525+08
  • http://www.pdf-repair.com)/ModDate(D:20100404093601+08
  • http://www.pdf-repair.com)/ModDate(D:20100404094947+08
  • http://www.pdf-repair.com)/ModDate(D:20100404095117+08
  • http://www.pdf-repair.com)/ModDate(D:20100404092506+08'00')/Title(Microsoft
  • http://www.pdf-repair.com)/ModDate(D:20100404093132+08'00')/Title(Microsoft
  • http://www.pdf-repair.com)/ModDate(D:20100404093243+08'00')/Title(Microsoft
  • http://www.pdf-repair.com)/ModDate(D:20100404093525+08'00')/Title(Microsoft
  • http://www.pdf-repair.com)/ModDate(D:20100404093601+08'00')/Title(Microsoft
  • http://www.pdf-repair.com)/ModDate(D:20100404094947+08'00')/Title(Microsoft
  • http://www.pdf-repair.com)/ModDate(D:20100404095117+08'00')/Title(Microsoft
  • http://www.w3.org/1999/xhtml
  • http://www.xfa.org/schema/xfa-data/1.0/
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#
  • http://ns.adobe.com/pdf/1.3/
  • http://ns.adobe.com/xap/1.0/
  • http://ns.adobe.com/xap/1.0/mm/
  • http://purl.org/dc/elements/1.1/

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