Malicious PDF — malware analysis report

Static analysis result for SHA-256 9285d5185fa2da43…

MALICIOUS

PDF

42.4 KB
MD5: 1853257e052ae276c3912b75fb2ede4d SHA-1: 05914685cb363c5e4fa680c3d6c2dc3a06670268 SHA-256: 9285d5185fa2da430b16d079290eb4a4557e41086b80f8cd5f784c0478e793ad
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF was flagged by multiple high-severity heuristics, including ML classification and ClamAV detection, indicating it contains an exploit. The 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic suggests the presence of a script designed to execute malicious code. The embedded artifact was also detected by ClamAV as 'Pdf.Exploit.Agent-36830'.

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
3a1a70df9eeef4f43f325184e97b4d46bcb197d3832d0261a4f0d3d8a3e2b472		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42688 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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