Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3958b3425ce6a77…

MALICIOUS

PDF

79.4 KB
MD5: f84c4e5fa8e1645b06bd47200696105b SHA-1: 890740ea2d9b720c641f8c4c66e0b87769ae9872 SHA-256: b3958b3425ce6a771f45b9d9f9f70ce2587b37c4a97d81dbfaae99f71b3a401f
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains an embedded script payload and was flagged by multiple detection engines, including ClamAV, as a malicious exploit. The ML classifier also returned a high probability of maliciousness. The presence of XFA forms suggests a potential vector for exploit delivery.

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
b79ec9bc98ceb0d18abe7c82acdcf4627ce6d8cd67617b373f28ce627a226bad		 pdf-embedded-script PDF raw stream script payload at offset 0x23E 80555 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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