Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa0b301125737d7…

MALICIOUS

PDF

42.7 KB
MD5: 3c111b4e2c9d3697b86963d6b3716cb4 SHA-1: 6b13834aa2ff0dd8abedaacb0d8dede475709342 SHA-256: 7aa0b301125737d7213b60192d12dd896f791c1f564e9988e82f5ebaa0d32de7
176 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection (Pdf.Exploit.Agent-36830) and an ML classifier. The presence of XFA forms and embedded script payloads indicates an attempt to exploit vulnerabilities within the PDF reader. The embedded script, though obfuscated, likely attempts 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
3b9446e9c235c75b497e0511a75f2b60c0cd1104c19c41ddfa9bcb5d56a959ee		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42960 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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