Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1e6fa0154b32b8…

MALICIOUS

PDF

79.1 KB
MD5: 30cfb591a69b2a89008ae8551fd829eb SHA-1: 69d182839f714136739ef883c50a188efc36e599 SHA-256: 2c1e6fa0154b32b80ec0044a4e544b997467f7ccd9c1fe23ead0eee87d037a8c
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution T1059 Command and Scripting Interpreter

The PDF file utilizes XFA forms and contains an embedded script payload, as indicated by multiple heuristic firings including ML and ClamAV detections. The presence of an embedded script suggests the PDF is designed to execute malicious code upon opening, likely leading to the download and execution of a second-stage payload. The specific nature of the payload is not detailed in the provided evidence, but the overall pattern points to a malicious document designed for exploitation.

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
1586f14c54c04362bd243b9390ddcb952373a77ff37ba5ef8541406c2fd6d2f6		 pdf-embedded-script PDF raw stream script payload at offset 0x23E 80301 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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