Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6a3aa1326e27a1…

MALICIOUS

PDF

46.7 KB
MD5: bc49ef0e1456ce007dcb94946e58b81b SHA-1: 357a18ffbe433b453f1b08570489e7d84dc9df6f SHA-256: 7d6a3aa1326e27a11099f75458fe314803d9f95dc95ceef5fb0480ac4c64a05e
186 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple high-confidence heuristics and a machine learning classifier. It contains embedded content and an embedded script payload, indicating it is designed to exploit vulnerabilities. The ClamAV detection 'Pdf.Exploit.Agent-36830' further confirms its malicious nature. The embedded script likely downloads and executes 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
61822779d541ca01db57e0384df986ea7b689e72fae2d72ee844b7d46bd98359		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 47045 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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