Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b020005a6485433…

MALICIOUS

PDF

10.1 KB First seen: 2013-07-24
MD5: be744980003d4a9e2160d6a987daa0ab SHA-1: 3654a5e37ae58f281a0461e900ae21aeaddd1005 SHA-256: 8b020005a64854338efaf80f3cef061bdc65789e2320e5ecfa1fe4f83cf6d267
110 Risk Score

Malware Insights

MITRE ATT&CK
T1557 Adversary-Controlled Chain of Trust

The PDF was flagged by a machine learning classifier as malicious with high confidence. Static analysis revealed an embedded file, which is a common technique for delivering secondary payloads. The document body is unreadable, providing no further context on the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • 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://ns.adobe.com/xdp/ In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.4/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text
    • http://ns.adobe.com/xtd/In PDF document text
    • http://www.xfa.org/schema/xfa-form/2.8/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x5A 13098 bytes
SHA-256: 41278dd921c0db2b8b8d1708bda5096e1ff3870f09893253c3270db643cc3371
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
xfa_image_rawvalue_000.tif pdf-xfa-image-tiff XFA image/rawValue TIFF payload near offset 0x47F 8642 bytes
SHA-256: 38c3af27d9b505d6216df6ce72dbb1008bb8ae91510e2eee0b723e64a53a8c46
Detection
ClamAV: Win.Exploit.CVE_2010_0188-7
Obfuscation or payload: unlikely

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