Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1be3cec441e101…

MALICIOUS

PDF

93.6 KB
MD5: bd4ef0668ad2dfc0790a99aff602bfac SHA-1: 42f2f72e6aded09962bdf9d6f88b15af184b60b8 SHA-256: eb1be3cec441e101aa387318b2a32d1cd6de313f1608a67d9f9e46d7b708cc5d
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains an embedded script payload, flagged by heuristics as malicious and detected by ClamAV as Pdf.Exploit.Agent-6136306-0. The presence of XFA form elements and an embedded script suggests an attempt to exploit PDF vulnerabilities. The embedded script is likely responsible for downloading and executing a second-stage payload, although its exact functionality is obscured.

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
5a931662f91271deffa1f0ca8d8789b9302908d46fe97863dfa600d47d093311		 pdf-embedded-script PDF raw stream script payload at offset 0x246 95094 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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