Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c264c00c9dfef4…

MALICIOUS

PDF

93.6 KB
MD5: b013150b916790bcac7ba383befbade5 SHA-1: a2fcf18a9986dce6849671b5d2a7ce92a69e66a9 SHA-256: 93c264c00c9dfef48b655aff61b903a0f9604045720f7e1816936d46a837104d
178 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious intent. The presence of an XFA form and an embedded script payload suggests the document is designed to execute arbitrary code. The embedded script likely downloads and executes a second-stage payload, as indicated by the 'Pdf.Exploit.Agent' ClamAV detection. The confidence is high due to multiple critical detections.

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
a91939e5971c08314f11c45715e56cd655dd42d3c7275eb507c4fce1c5e8ab30		 pdf-embedded-script PDF raw stream script payload at offset 0x246 95096 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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