Malicious PDF — malware analysis report

Static analysis result for SHA-256 716ab9c813f5ca8e…

MALICIOUS

PDF

42.4 KB
MD5: 19ece4c28c61f6fdf95a0196ec839dfe SHA-1: 8aeea5eb4cf580826e60e55bbc18915ea2f97fa5 SHA-256: 716ab9c813f5ca8e3d45b35b1e32db180113c5c8c8d048b367b73f1c214d17b4
176 Risk Score

Malware Insights

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

The PDF sample was flagged by multiple heuristics, including ML classification and ClamAV, indicating it contains malicious content. The presence of XFA forms and embedded script payloads suggests an exploit targeting PDF vulnerabilities. The embedded artifact, detected by ClamAV as Pdf.Exploit.Agent-36830, likely contains the malicious script responsible for further execution.

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
125bfc5e4f6898e4e290255ffea3adbc3f0f3cb4e07483696c730ca6ad34c480		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42672 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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