Malicious PDF — malware analysis report

Static analysis result for SHA-256 089d1a7e5858a415…

MALICIOUS

PDF

42.4 KB
MD5: a966b6d56647a377c432509378a1671f SHA-1: 2f9fcd0d7d81d92da09f3fe5d6053e62ffa49a07 SHA-256: 089d1a7e5858a415bb9d0e62f2cef3f7a1b387dded3b0e0941c5ab8d442e5bf4
176 Risk Score

Malware Insights

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

The PDF sample contains embedded script content and is flagged by multiple heuristics, including ClamAV detection for 'Pdf.Exploit.Agent-36830'. The embedded script, though obfuscated, likely attempts to download and execute a second-stage payload, a common technique for exploiting client execution vulnerabilities in PDFs. The ML classifier also strongly indicates maliciousness.

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
5c5dd574203eeddab35e392f7589113575b4e8a3c617eb682582d2ab6b5073ba		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42684 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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