Malicious PDF — malware analysis report

Static analysis result for SHA-256 29136c17ef77921e…

MALICIOUS

PDF

93.4 KB
MD5: 84b0f4dbf63a1dc0dc9818124934c869 SHA-1: 2e5e718ba679058c0a283286aa50361f8879659c SHA-256: 29136c17ef77921ef0ba5690af285cf804a9b6acea1aadedb10da1c5ca8deae5
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file utilizes XFA forms and contains an embedded script payload, as indicated by critical heuristic firings. ClamAV detections confirm its malicious nature, identifying 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 structure. The presence of XFA suggests an attempt to exploit vulnerabilities within Adobe's XFA processing or to leverage its scripting capabilities for malicious purposes.

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
97e6448054811503c9b3b3713a3b5d2e1ef9cb1e5a0079d3cfc13bed130c542f		 pdf-embedded-script PDF raw stream script payload at offset 0x246 94920 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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