Malicious PDF — malware analysis report

Static analysis result for SHA-256 c605bdda045e4eaf…

MALICIOUS

PDF

79.3 KB
MD5: 2f01c77662caaf46eb1047a1e5b23fe4 SHA-1: a277ed532df6bdfa693e515de102a309b7cfa374 SHA-256: c605bdda045e4eafcdb7d4fb3641113d9d899efcddbaacab1c3b5a1b0f94e4e4
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF utilizes XFA forms, a known vector for exploitation. A critical ClamAV detection (Pdf.Exploit.Agent-6136306-0) and a high ML score confirm its malicious nature. The embedded script payload, though not fully detailed, is indicative of a dropper or exploit execution mechanism. The embedded URLs are likely related to the XFA form functionality but are included as potential indicators.

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
110d8504d300d32264ac99d9e161216eae7aabb48761f64d56967013f180fb58		 pdf-embedded-script PDF raw stream script payload at offset 0x23E 80469 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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