Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b2dedeb953b26a…

MALICIOUS

PDF

12.8 KB
MD5: 2bbf05643bc17a9414b8be118f03cdeb SHA-1: 6b661ba3c61f3705cf99ee529aa3b5dd129d827a SHA-256: 85b2dedeb953b26a994c8823d1d364a65e7115dbadb2159106daedb3392a0f3f
168 Risk Score

Malware Insights

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

The PDF sample contains embedded XFA content that triggers the CVE-2010-0188 exploit, a known vulnerability in Adobe Reader. The embedded JavaScript, although obfuscated, likely contains code to download and execute a second-stage payload. The ML classifier and ClamAV detection 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_00000384.bin
4e1405968d38574758fb0583118f152cf97526a06e3ef8b12b1fa648f142cd89
pdf-embedded-script PDF raw stream script payload at offset 0x384 12288 bytes