Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc6f19225330b70…

MALICIOUS

PDF

42.1 KB
MD5: ae7f02906f213c6250c74d24d2c99f90 SHA-1: 72387cceb6850ae3506793dd39d0f4659b4d6557 SHA-256: 9dc6f19225330b70a5c01e4235f520122509be0c720eb998d8a93496c4bfc5c5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment

The file is identified as a malicious PDF by multiple high-confidence heuristics, including ML classification and ClamAV detection (Pdf.Exploit.Agent-36830). The presence of an embedded script payload and an embedded file strongly suggests it's designed to exploit vulnerabilities and likely download a secondary payload. The DOC BODY content appears to be obfuscated script fragments rather than user-readable text, further indicating a malicious intent.

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
02c710361eca957caca7b49cfedadf485b91dd39e77322d10782a8f3e98a32b8		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42359 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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