Malicious PDF — malware analysis report

Static analysis result for SHA-256 593d87e00926270d…

MALICIOUS

PDF

42.1 KB
MD5: 13fe9c4f532e9704519cc7546e45cd1e SHA-1: 71f156eeaef7e543a53a6a4b2d6e3a1bc2dbcda4 SHA-256: 593d87e00926270df28bb81d6c1a68dd48201c42a2c3d64aeefb68c252fc792f
186 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple engines, including ClamAV with the signature 'Pdf.Exploit.Agent-36830'. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to exploit vulnerabilities and download further malicious content. The ML classifier also strongly indicated maliciousness.

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
9e96f769f4cb394f8e1a855d06b106f881544903a66c85ded6cbc18f15234311		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42360 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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