Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5fac2ae6571e9b…

MALICIOUS

PDF

50.8 KB
MD5: 2db243edfa6f08ae2f3d8c4fb8ca90d2 SHA-1: b3a8634ce10941d728426c4f4923d74006052091 SHA-256: 1b5fac2ae6571e9b5f2e329d3202dfc70377a6894f12d9e431bb9275d25fe4a8
118 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file was flagged by ClamAV as Pdf.Exploit.Agent-6136306-0, indicating it contains an exploit. The presence of an embedded script payload and XFA form further supports this. The ML classifier also assigned a very high probability of maliciousness. The embedded script likely downloads and executes a second-stage payload, though its exact function is obscured.

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://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_00000240.bin
34683151192e9d8c06447edfb77e8923bd5f304024a3a17a16cb87d8fa80bace		 pdf-embedded-script PDF raw stream script payload at offset 0x240 51270 bytes

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