Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32fcc6d37d24837…

MALICIOUS

PDF

82.6 KB
MD5: 0cc761b11e367dd96df2c5b83f0382f5 SHA-1: 17505c57a97d5164bb25987b173e4b7dea55fb53 SHA-256: b32fcc6d37d2483711afeea41c79b05b463f87d5c450a91970104f88ecd41009
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF T1566.002 Phishing: Spearphishing Attachment

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detections, indicating it contains an exploit. The presence of an XFA form and an embedded script payload further supports this. The embedded script is likely responsible for executing the exploit and delivering a secondary payload, as suggested by the ClamAV detections on the file and its extracted artifacts.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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.
  • 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_pdf_script_00000246.bin
5f35b30306ea9a328cc021ae086162aee32000fed03ad994b9725d19232bdc03		 pdf-embedded-script PDF raw stream script payload at offset 0x246 83839 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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