Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e5c94bd8190423…

MALICIOUS

PDF

79.3 KB
MD5: e56e934c15fcde8529e2909e6025c88b SHA-1: 1ef4b2687a3d0103f988ffbafb1370b6f1b9ee48 SHA-256: 69e5c94bd819042390032ef366fd785ef8d1af4ec2a237d58f8e50ddeaab694b
168 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged as malicious by multiple engines, including ClamAV, and exhibits characteristics of an XFA form exploit. Embedded JavaScript within the PDF stream is heavily obfuscated but appears to be designed to download and execute a secondary payload. The presence of XFA and embedded scripts strongly suggests an attack pattern aimed at exploiting vulnerabilities within PDF viewers.

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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded script payload in PDF stream low 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.
  • 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
d93ba0c4d028d2254b7925f898acc9e7b7b2a5bc0d8f6d69c993730a4f7519b7		 pdf-embedded-script PDF raw stream script payload at offset 0x23E 80467 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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