Malicious PDF — malware analysis report

Static analysis result for SHA-256 f76688de92c1c59d…

MALICIOUS

PDF

79.1 KB
MD5: c167ecef0ba1cd624264372331acea22 SHA-1: 8a2055110ec2c01a7693681ae1614fff05d8c5f8 SHA-256: f76688de92c1c59d439e94a2ef2b8dc910656044f35bbc53dd95455ca9d6a8ef
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection, indicating it is a malicious exploit. The presence of an XFA form and an embedded script payload further supports this assessment. The embedded script is likely responsible for delivering the exploit payload, though its specific actions could not be determined due to obfuscation.

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_0000023e.bin
e08df4f2e2b0e891dbe1178e6b0c447569262e5b2d03b86a4cffb8b9e1d57602		 pdf-embedded-script PDF raw stream script payload at offset 0x23E 80299 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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