Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb1334ace566b3f…

MALICIOUS

PDF

93.5 KB
MD5: f7feb8d4584d74776fad304ee517630d SHA-1: 411c338bd2c07b46d801b49540f1bf6414862c43 SHA-256: 9fb1334ace566b3f0552fdd08a94bd7f788479ae9b8fa07040d108987abffdc7
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF utilizes XFA forms and contains an embedded script payload, strongly indicating malicious intent. ClamAV detections confirm this, identifying it as Pdf.Exploit.Agent-6136306-0 and an extracted artifact as Pdf.Exploit.Agent-36769. The ML classifier also flagged it with a very high probability. The embedded script is likely responsible for downloading and executing a second-stage 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
de0cafb11734bd529911334ce1607c8e2f1e9e0c4b0346f02db727f98bfd748e		 pdf-embedded-script PDF raw stream script payload at offset 0x246 94994 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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