Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f857706cef7770…

MALICIOUS

PDF

79.3 KB
MD5: 4c2a04b4ace5e84f079974c6e1d829c8 SHA-1: 81cd6911ebbf65f2b37b02df2e702bc4686a842e SHA-256: 16f857706cef777075cbdb1725498ef667a0be8ec1beb8370acb06947896a4cd
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. An embedded JavaScript payload was extracted, which is heavily obfuscated but likely responsible for executing the exploit. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with 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://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_00000288.bin
51de72fe913110b0f3b7dd20d0577b9a19c4828b69488b150fd888d0911b548c
pdf-embedded-script PDF raw stream script payload at offset 0x288 80461 bytes