Malicious PDF — malware analysis report

Static analysis result for SHA-256 6052e56b8ea19f83…

MALICIOUS

PDF

42.5 KB
MD5: bd6e0e855e14f4e8341a621f48339de1 SHA-1: 332a0effa123e7c909e232f870bf0d919a030242 SHA-256: 6052e56b8ea19f8302490b030f70d2d5c071c42ba722611d6dc5a7ee2014cf92
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF was flagged as malicious by multiple heuristics, including ML classification and ClamAV detection (Pdf.Exploit.Agent-36830). It contains embedded content and XFA forms, common vectors for PDF exploits. The embedded artifact, also detected by ClamAV, likely contains the malicious payload. The benign URLs present do not detract from the malicious nature indicated by the exploit and embedded artifact.

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
e36287fb5c725643d72d67a93ab43f2b4be8a4e86a1554e3e35b3fbedbf6153a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42784 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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