Malicious PDF — malware analysis report

Static analysis result for SHA-256 13f34af8a43ddc8f…

MALICIOUS

PDF

110.8 KB
MD5: b303f99302273b5d34f04770282fe7b9 SHA-1: 27f96fbb57f36d8146595c7a47722833f39235b6 SHA-256: 13f34af8a43ddc8fdbad5b6dd848d5a060e092026efe4f0ce02e55ee5ef29bff
228 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to the critical heuristic firing for CVE-2010-0188, indicating an exploit for Adobe Reader. The embedded XFA script, which is JavaScript, contains obfuscated code that attempts to reconstruct a string. This script is likely responsible for downloading and executing a second-stage payload, as suggested by the ClamAV detection on an extracted artifact (Js.Exploit.HTML-27).

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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_00000238.bin
6af2511e4214bdbb6339dda348014eda9a564f96bd5a6533f69a311ceb7d6604		 pdf-embedded-script PDF raw stream script payload at offset 0x238 112777 bytes
Detection
ClamAV: Js.Exploit.HTML-27
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.