Malicious PDF — malware analysis report

Static analysis result for SHA-256 1639ec4f1d959c3d…

MALICIOUS

PDF

16.0 KB
MD5: c27c0e8e43a11a9d6b1c9e6c69a865d3 SHA-1: 43527ef9a61381ffd94f18cde3873cbc3f971967 SHA-256: 1639ec4f1d959c3d965b6da678b8d0812ed8407cafd20f5176a4afd22fa99a01
168 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms and LibTIFF. The embedded script, although truncated, contains JavaScript code that likely contributes to the exploitation process. The ML classifier and ClamAV detection strongly indicate malicious intent, pointing towards an exploit delivery mechanism.

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_0000034e.bin
09c39625217bfbe80b53d0f5614f1804924c8068e883df49708bc29d4ff22418
pdf-embedded-script PDF raw stream script payload at offset 0x34E 15701 bytes