Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e65f1fa9163c3c…

MALICIOUS

PDF

42.4 KB
MD5: e0df2cc5454cc721a39499e3ef174558 SHA-1: dfe74f54f34988d7e322c36d7feba205697d2fc7 SHA-256: d3e65f1fa9163c3c6b262481b0a3a43c903a40cf33607e990ce5ac8187cbc49a
188 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple critical heuristics, including ClamAV detection (Pdf.Exploit.Agent-36830) and an ML classifier, indicating it contains a malicious exploit. An embedded script payload was also identified, suggesting the PDF is designed to download and execute a second-stage payload. The specific exploit and payload are not detailed in the provided evidence, leading to an 'unknown family' classification.

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
4e5c6d738fabb3da7a84b56b6336072cfe49887e71cbacdfa8e193bec48a0b38		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42648 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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