Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d2f734f8d1f061…

MALICIOUS

PDF

42.5 KB
MD5: 8afa3e4f1e1880674ceda2d775f969e9 SHA-1: cc5db3cbcd58b6f250ce770b34b3713bfa82dee9 SHA-256: 37d2f734f8d1f061a6d8a38bdb7af9d67a93ea2b6e4f478496eb7b6b910ec43c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains embedded content and a script payload, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV detections for 'Pdf.Exploit.Agent-36830' on both the main file and an extracted artifact strongly suggest exploitation. The XFA form and embedded file further support the nature of the attack. The exact nature of the exploit and payload is not fully discernible from the provided evidence, leading to an 'unknown family' classification.

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • 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.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • 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
  • 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/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
dac30e37d1cc37312d3ed057e615cd8364b057cea20b4b5bd538ffaf657282c6		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42746 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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