Malicious PDF — malware analysis report

Static analysis result for SHA-256 79cda2eaf09a4edb…

MALICIOUS

PDF

79.6 KB
MD5: 21c879961c473db32d83ee8774c58c33 SHA-1: 003e015a5423b33b3d935c32bd8258b0d66d4ebf SHA-256: 79cda2eaf09a4edb161729bf8c4b2f95351ad4b197ebc73890c41265ba1b1930
168 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains an embedded XFA form that triggers the CVE-2010-0188 exploit, targeting Adobe Reader. The exploit payload is an embedded JavaScript script which is heavily obfuscated. The script appears to be designed to download and execute a second-stage payload, though the exact URL is obfuscated within the script's string concatenation. The benign URLs present are likely decoys or standard XFA schema references.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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_00000288.bin
b64b59eed1962f554cbf45006d3bf27459c72d89f2bbbde7eb74759acc47359d		 pdf-embedded-script PDF raw stream script payload at offset 0x288 80802 bytes

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