Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59e1ce77827d3df…

MALICIOUS

PDF

42.4 KB
MD5: 1be03babe71df130be9913036d4fc22e SHA-1: 5f66352c546cdbfedf6831cfdf4f33e4abd5dc74 SHA-256: f59e1ce77827d3dfa59237c4de1a07fa8f4c65d51758c7afcf6c2b2e131011f6
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

This PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating it contains malicious content. The presence of an embedded script payload and an embedded file suggests the document is designed to exploit vulnerabilities and deliver a secondary payload. The ClamAV detection name 'Pdf.Exploit.Agent-36830' is a strong indicator of its malicious nature.

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
92fe06171af8bbea0d64520754f7f110fc757dc8f6a2163f14ece2d8eda1c58d		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42686 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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