Malicious PDF — malware analysis report

Static analysis result for SHA-256 9026ced287c0b8f9…

MALICIOUS

PDF

100.5 KB
MD5: a82eecdb2d9cf8774f5dc38d2eec655f SHA-1: 94899b28f711db0fbc557bcfbe57e42199bc4c51 SHA-256: 9026ced287c0b8f9a26044223bf7998b5fda63ca4fffc1cae87c46f952b3195e
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF T1566.002 Phishing: Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and a machine learning classifier, with critical heuristics indicating an embedded script payload and XFA form exploitation. The embedded script is likely responsible for delivering the malicious payload. The presence of XFA form elements suggests a sophisticated attack vector.

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
d9b29aa060a42d065a27587a9c2e919872bcbf707ed11d176f4dbabccda10b6c		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102156 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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