Malicious PDF — malware analysis report

Static analysis result for SHA-256 5217b84fd7a8d1c0…

MALICIOUS

PDF

82.7 KB
MD5: a725bd24183f2fa9e19305d9efb840a0 SHA-1: 3a348b2f3b5e5608b78aaad6a3d2da4dc689c772 SHA-256: 5217b84fd7a8d1c07e86fce217b3bc9b7c250df24825a89875b233c07e0886e6
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File

The PDF was flagged by multiple high-severity heuristics, including ML classification and ClamAV detection, indicating it contains an exploit. The presence of an embedded script payload further supports this. The embedded URLs are related to Adobe XFA, a common vector for PDF exploits. The primary detection is Pdf.Exploit.Agent-6136306-0, with an extracted artifact also detected as Pdf.Exploit.Agent-36769.

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.
  • 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.
  • 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_pdf_script_00000246.bin
9c27d7a3baece7e029e8de8ff601d76e85a032bb1fe95319e4bdd2c306437f5d		 pdf-embedded-script PDF raw stream script payload at offset 0x246 83929 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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