Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4c7033fcac029f…

MALICIOUS

PDF

100.4 KB
MD5: 94594960b92e76ccfb0e12a9057f970e SHA-1: be59f4bf64c09e4dd8d44cd0db5e62b1f2150b3e SHA-256: 2a4c7033fcac029ffb556cbdef2607e0c0df84731b0b595d5eaa55c2aaa2b8f5
148 Risk Score

Malware Insights

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

The PDF utilizes XFA forms, a known vector for embedding malicious content. A critical heuristic identified an embedded script payload, and ClamAV detections confirm its malicious nature, specifically flagging it as Pdf.Exploit.Agent. The embedded script is likely responsible for downloading and executing a second-stage payload, although its exact functionality is obscured by the PDF stream. The presence of XFA and embedded scripts strongly suggests an exploit attempt aimed at users opening the PDF.

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
e92c2a11c5c03ef64fde1f582f9c39bca39ab068b5c3bc269c4d1a5ba1eef6ad		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102044 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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