Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a6bcb62a6a56f4…

MALICIOUS

PDF

10.4 KB
MD5: 69b9870c63aa22ea094ae64be3178954 SHA-1: 92becaa0bf871b38e7a5c92f2c7252f10f4dbd4e SHA-256: 12a6bcb62a6a56f449016ed29672625d7c8de17847d6ac6789f089b33b26344b
110 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by multiple engines, including ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an XFA form and an embedded file suggests an attempt to exploit PDF vulnerabilities for code execution. While no specific script content is directly readable, the embedded file and XFA structure point towards a dropper or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.4/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
86069873ccab03163c979420576f6154b0c25bbfec3ddfdd98c0ed0c79c96bde		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x8C 13408 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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