Malicious PDF — malware analysis report

Static analysis result for SHA-256 88583f75d7e0891f…

MALICIOUS

PDF

79.1 KB
MD5: 820ed68a269199da2430b98d9bbb12e8 SHA-1: c8c7043143233977acb9ebc4317ae3ea5d37a89d SHA-256: 88583f75d7e0891f6abddfd8ca4ce534bb189bd6066f5d1978a079e5eb84a66a
148 Risk Score

Malware Insights

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

The PDF utilizes XFA forms and contains an embedded script payload, as indicated by multiple critical heuristic firings including ClamAV detections for Pdf.Exploit.Agent-6136306-0 and Js.Exploit.HTML-29 on an extracted artifact. The embedded script is likely responsible for executing the malicious payload. The presence of XFA suggests a potential exploit targeting PDF reader vulnerabilities.

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_0000023c.bin
5b17851ec30a00bd3dcfd0f57708b0ed76eb42c59ba652bc06807dbd0ad24736		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 80285 bytes
Detection
ClamAV: Js.Exploit.HTML-29
Obfuscation or payload: unlikely

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