Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7b5be988d5f517…

MALICIOUS

PDF

42.4 KB
MD5: a68cc76a68a321757e6294457504cdfb SHA-1: f300502c74de7cfcb3cbd51f7ba71e01cb375e11 SHA-256: 8c7b5be988d5f5170f86ad9517846091ffabc33d6cc2c45231c8870e701aef43
186 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple high-confidence heuristics, including ML classification and ClamAV detection. The PDF contains embedded content and XFA forms, which are common vectors for exploit delivery. While no specific script was directly readable, the presence of embedded artifacts and exploit signatures indicates the file is designed to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_file_obj0008.bin
9f7a729945c3e97591779a8fd46bab745e8a30d3c2df6e5f79443f53e6480508		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42654 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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