Malicious PDF — malware analysis report

Static analysis result for SHA-256 dceabb3aeb0a2897…

MALICIOUS

PDF

93.2 KB
MD5: 31b173d41860e3c208f2322ca2dfbc2b SHA-1: 79a3b2ccaff9be4b5d4700b8437cbf83753a17de SHA-256: dceabb3aeb0a2897090eec93cf2b201cadb39911148d205f136eb2c95050e372
178 Risk Score

Malware Insights

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

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 suggests the PDF is designed to execute malicious code. The embedded script likely downloads and executes a second-stage payload, though its exact function is obscured by the PDF structure.

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
e0e1a66035eb844177404a188dac564285a2cbafa23016f823e1192e09767c09		 pdf-embedded-script PDF raw stream script payload at offset 0x246 94714 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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