Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ece9efa601657b6…

MALICIOUS

PDF

100.4 KB
MD5: 995765f56db5cc8dd550625e5c953574 SHA-1: 0e0393bb6ea515b0d3c4b8483c7e1363488312a6 SHA-256: 1ece9efa601657b6a7ddcd0fe4a243f1747eefbf77d37598e09940ebdc7b3556
178 Risk Score

Malware Insights

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

The PDF file utilizes XFA forms and contains an embedded script payload, as indicated by multiple high and critical heuristic firings, including ClamAV detection. The ML classifier also strongly flagged this PDF as malicious. While the document body is minimal and the embedded script is not directly readable, the presence of XFA and embedded script points to an exploit delivery mechanism. The embedded URLs are likely part of the exploit chain or lure.

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
db6022df8b71b52ee80e8bea4aac38ccb009ab315af09845e1b0374e5d87165d		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102042 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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