Malicious PDF — malware analysis report

Static analysis result for SHA-256 91bc35ced9ede131…

MALICIOUS

PDF

79.1 KB
MD5: 4795dff1d7399e2f6b707f49b05263c2 SHA-1: 53fd84022c191299fbda9164df25f0f87fb4a686 SHA-256: 91bc35ced9ede1310773f13f7f2c5186953326a3d67b473a1d130f88f55e8412
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF T1059.001 Command and Scripting Interpreter: PowerShell

The PDF utilizes XFA forms, a known vector for exploits. A critical heuristic indicates an embedded script payload, and ClamAV detections confirm this is a malicious PDF exploit. The embedded script likely downloads and executes a second-stage payload, contributing to the overall malicious intent of the document.

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_0000023e.bin
7b4d0c2df8e9faa8a589c16294cc29ca3f64d3c567dfd41ecf26369810b56c4f		 pdf-embedded-script PDF raw stream script payload at offset 0x23E 80301 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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