Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e30af18c09833b…

MALICIOUS

PDF

42.5 KB
MD5: 0da8b1c2bdacbdb57249b16f61bbf0e7 SHA-1: d737ab324230788e5768de8b063711104f0d2f08 SHA-256: 04e30af18c09833bc373548bb0e44db86430dd3f39a3c30bc8aa8e2cc134e7de
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF was flagged by multiple heuristics, including ML classification and ClamAV detection, indicating it contains an exploit. The presence of embedded script content and an embedded file further supports its malicious nature. The script appears to be JavaScript, likely intended to download and execute a second-stage payload.

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 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 script payload in PDF stream low 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 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
490ef7272311f379b52326ad63d6851c7069f7de3edd3c624a1ee441d9693a42		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42739 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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