Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b83b2ab4eb5c43d…

MALICIOUS

PDF

101.9 KB
MD5: 40f5fe18ae715b5f973a736382bcaf0e SHA-1: 0f430c9ece28c3e4815174802d4ec0fa87e45b8c SHA-256: 6b83b2ab4eb5c43d0ab8ef635eba5a9d7db340e44d6665dcdef35dd2e796f989
168 Risk Score

Malware Insights

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

This PDF file exploits the CVE-2010-0188 vulnerability in Adobe Reader, specifically targeting XFA forms. The embedded JavaScript, when decoded, appears to be part of the exploit mechanism, likely intended to download and execute a second-stage payload. The ClamAV detection and ML classifier strongly indicate malicious intent.

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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000346.bin
43eb2b72a66e9f936099073b3d1e560af4c46bba5acb1a28dd4d2b95823f3090
pdf-embedded-script PDF raw stream script payload at offset 0x346 103666 bytes