Malicious PDF — malware analysis report

Static analysis result for SHA-256 370222820d7c2d18…

MALICIOUS

PDF

42.7 KB
MD5: 2aa94b84140b89cff1363a0e26507b40 SHA-1: 72018db694b83b88fc5d68e1c82d943759c1b10e SHA-256: 370222820d7c2d184890a4b1ec76d2bb21b3ac50b952e507d6dee3df9acb605b
188 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV with a critical severity, indicating a high likelihood of malicious intent. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting the PDF is designed to deliver and execute further malicious content. The embedded URLs, while not directly malicious in reputation, are part of the PDF'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
717e86d462f067c1b58ed036fccd8ab91337f869cc129edcf0f697385e62dc5c		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42921 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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