Malicious PDF — malware analysis report

Static analysis result for SHA-256 3231a971df10c1a7…

MALICIOUS

PDF

93.3 KB
MD5: 3a1543e3b972ab2cdf66fb098d640e8f SHA-1: 4a1174da497968554eb6ec2f9a0be71e8d03b6a2 SHA-256: 3231a971df10c1a73d7e16bd332ed92a9e36168d760dcfa7ec941148462e5337
178 Risk Score

Malware Insights

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

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection, indicating it contains an exploit. The presence of an XFA form and an embedded script payload further supports this. The embedded artifact 'embedded_pdf_script_00000246.bin' is likely the malicious payload, though its specific function cannot be determined from the provided evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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.
  • 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_pdf_script_00000246.bin
a0fd461072fe489bd53c0e2ab27d4c550fab989d7a5a257af8245be40c051210		 pdf-embedded-script PDF raw stream script payload at offset 0x246 94820 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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