Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6e1c54cf4e3c0b…

MALICIOUS

PDF

93.4 KB
MD5: b79ff86e16f4335069c84969bb41dc87 SHA-1: 1d666fe6744c7d11c272774838f341334f34ed16 SHA-256: ea6e1c54cf4e3c0b63d4c6240f7d8dc5b1f9d2e261da090f16e79435fbfdfb7d
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: Malicious PDF

The PDF file exhibits characteristics of malicious intent, including the presence of an XFA form and an embedded script payload. ML classification and ClamAV detection strongly indicate maliciousness. The embedded script is likely responsible for delivering the secondary payload, as suggested by the 'Pdf.Exploit.Agent' ClamAV detection.

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
4a62415d5bc7beb3547935efa267dc97eb185c98c83fa20d307b65eceb964211		 pdf-embedded-script PDF raw stream script payload at offset 0x246 94922 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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