Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a5befec737b2df4…

MALICIOUS

PDF

100.5 KB
MD5: b18e4980cfb3aad327ddf3d690b905ab SHA-1: 0165af12a3e723210eca0557a74d829c51bf1553 SHA-256: 1a5befec737b2df4c25c0323e5a5b3ee3e5b23f1fb1dc0be1da86d1d2c4d901f
118 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Exploit.Agent-6136306-0 and a machine learning classifier indicated a high probability of maliciousness. The presence of an embedded script payload and XFA form suggests an exploit attempt. The script is likely responsible for downloading and executing a second-stage payload, though its exact functionality 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_00000246.bin
cd69b4fd1f94d24a023e1239c810a3a1b55ee440573db83c89715421d9a8933d		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102152 bytes

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