Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a61ca9c9c0bf560…

MALICIOUS

PDF

93.4 KB
MD5: 15949fa7c6417dae86263e6d2698af7a SHA-1: 5ec9216e86e7208af67b74a80391fab7d8c3523c SHA-256: 2a61ca9c9c0bf560fd8bde585399e3243a4af6447d766deef745c143b62f57a3
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.002 Phishing: Spearphishing Attachment T1059 Command and Scripting Interpreter T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains an XFA form and an embedded script payload, strongly indicating malicious intent. ClamAV detections confirm this, identifying it as Pdf.Exploit.Agent-6136306-0 and Pdf.Exploit.Agent-36769 on an extracted artifact. The ML classifier also flagged it with extremely high confidence. The embedded script is likely responsible for executing the exploit and delivering a secondary payload.

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
5859fd0d0a0eacdf92219a821e71e4387ae5ed27a646a207072bec876813012b		 pdf-embedded-script PDF raw stream script payload at offset 0x246 94922 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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