Malicious PDF — malware analysis report

Static analysis result for SHA-256 46cca523f265ca53…

MALICIOUS

PDF

42.8 KB
MD5: eca3b7e2ed45357b49d99184081e9230 SHA-1: b71bb91ae4393452e368afebb67927944aeda335 SHA-256: 46cca523f265ca5383bd476d6f23a8a47d79768460448e98f449ba5f8e112935
188 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 (Pdf.Exploit.Agent-36830), indicating it contains an exploit. The presence of an embedded script payload and an embedded file further supports its malicious nature. While the exact script functionality is obfuscated within the document body, the overall pattern suggests it is designed to deliver a secondary malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
a08c17ee4405f6c670c536514f9bc8fda2f06511b507a9e926f9abd409babcf4		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43046 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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