Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4566914dae860e…

MALICIOUS

PDF

82.5 KB
MD5: 7649b35ead93374484a84ded98b75b39 SHA-1: d42a35e1cc0010c7c53734dd2efe0572cf004afb SHA-256: 7d4566914dae860ea12ef1c34f27240e09260e01d50fe1be2993fb859ae998d8
168 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple engines, including ClamAV which identified it as 'Pdf.Exploit.Agent-6136306-0'. The presence of an embedded XFA form and a JavaScript payload within a PDF stream strongly suggests an exploit is being used for client-side execution. The script itself appears to be heavily obfuscated, but its structure indicates it is designed to download and execute a second-stage payload, a common technique for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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.
  • 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_pdf_script_00000246.bin
2b85ec7904b47b36e77fd5d53a5df428e196d7b37f5d08a7dc9e40fefdbe073c		 pdf-embedded-script PDF raw stream script payload at offset 0x246 83747 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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