Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec2f9d6d7a6b44e…

MALICIOUS

PDF

42.6 KB
MD5: 11d8192669be9da6555be5d16d674c58 SHA-1: 0c1329862528340418e32aadc260531248a96b4f SHA-256: 0ec2f9d6d7a6b44ef90741c012de9e8a473f95fdb660de9d379f537df39aa37c
176 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ClamAV and an ML classifier, indicating an exploit. The presence of an embedded script payload and an embedded file suggests the PDF is designed to execute arbitrary code, likely to download and run a second-stage payload. The embedded script, though obfuscated, appears to be JavaScript, consistent with PDF exploits.

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 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 script payload in PDF stream low 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 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
308aa948e187f260a703e72782bc5933d564c4eb2f23a68b80f531b25eabdeb3		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42831 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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