Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a95caf70dd0d63b…

MALICIOUS

PDF

102.2 KB
MD5: c814fa52e0fb12bf59e6162fcfcc362c SHA-1: e7a536fe58540f4b451a4095d9a67619cd016c61 SHA-256: 5a95caf70dd0d63bc5d562c30fbb59a4b56d8b7c52263d4fb0ffe25b017cdf9b
168 Risk Score

Malware Insights

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

The file is a PDF that leverages the XFA form functionality to exploit CVE-2010-0188 in Adobe Reader. The embedded JavaScript, although obfuscated, is indicative of malicious intent, likely to download and execute a second-stage payload. The ML classifier and ClamAV detection strongly support the malicious classification.

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
476e0dc8b0c9499c2cb6d72d6fbbf645675d90e5eadad9ff330b2efbab932b06
pdf-embedded-script PDF raw stream script payload at offset 0x346 103933 bytes