Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b096eeed8751b8…

MALICIOUS

PDF

93.2 KB
MD5: abe2dce0c106dff35d81ce49ef592911 SHA-1: 822c3c96da57e0712334b0bea430a7b8f069e5bf SHA-256: c4b096eeed8751b898aa1c5a2a128a0b757b703d7183d092000a1c3a1a920dfd
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, indicating it contains an exploit. The presence of an XFA form and an embedded script payload strongly suggests it's designed to execute malicious code. The embedded artifact, likely the payload, was also detected by ClamAV. The attack pattern is consistent with a malicious PDF designed to exploit vulnerabilities or trick the user into executing a payload.

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
cabd2b532c13ce861f8302894fef97d4a29dc860a2bbf8bbf0587953dcf23463		 pdf-embedded-script PDF raw stream script payload at offset 0x246 94712 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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