Malicious PDF — malware analysis report

Static analysis result for SHA-256 4814ef6c84f40ca5…

MALICIOUS

PDF

46.7 KB
MD5: eeda76b79710fa556df253477ef06863 SHA-1: b9d09d408c339faed5217c10cc7be75f45198d4c SHA-256: 4814ef6c84f40ca53ef417426184c32b054552210dbd9eed1ffbf3066a1585cb
186 Risk Score

Malware Insights

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

The file is identified as malicious by multiple high-confidence heuristics, including ML classification and ClamAV detection (Pdf.Exploit.Agent-36830). It contains an embedded script payload and an embedded file, indicating it's designed to exploit PDF vulnerabilities. The embedded URLs, while not directly malicious, are part of the document's structure.

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
a88ccf6efb727312b5cb9aa75ad70ce2d1085219f91e7f3392f223517db8bc73		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 47039 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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