Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb24ba44023092b6…

MALICIOUS

PDF

79.1 KB
MD5: 35c9bad89e88912fecc448480bbaf9ec SHA-1: 6d1cac7e5ebd7c4d0b0bf661bce0f1726d7a05b5 SHA-256: fb24ba44023092b6f553fd5ec009b2cf9bb39fc1499838b40874fcc41e7becdf
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection, indicating it contains an exploit. The presence of an embedded script payload and XFA form further supports this. The embedded artifact was detected by ClamAV as a JavaScript exploit. The primary attack pattern involves luring the user into opening a malicious PDF that exploits a vulnerability.

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_0000023c.bin
1a13d8c7ce16a6554de55de9dac34417a7abd54b6e22a34dd38fe7e7f488404b		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 80283 bytes
Detection
ClamAV: Js.Exploit.HTML-29
Obfuscation or payload: unlikely

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