Malicious PDF — malware analysis report

Static analysis result for SHA-256 571890ba9af7d8ed…

MALICIOUS

PDF

12.8 KB
MD5: acf3b9695b679f1b27333061ca37d0e1 SHA-1: ad9e3811d05fc247e2c3a4f64d284277e27968ac SHA-256: 571890ba9af7d8ed54ede95345b4fe5927160d255e542be46c5b8e12e2bf036a
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains an embedded script payload, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic and the ML_NYX_PDF_MALICIOUS classifier. ClamAV also detected it as Pdf.Exploit.Agent-6136306-0. The embedded script is likely responsible for downloading and executing a second-stage payload. The presence of an XFA form further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000359.bin
c4c8b6e04c274a9dcf936e0c24af1c572e0f9d6ad2ee72ecd46204772b004600		 pdf-embedded-script PDF raw stream script payload at offset 0x359 12340 bytes

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