Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1bca8c0e800ed9…

MALICIOUS

PDF

16.2 KB
MD5: 11b52984cbc7023dae9736597997d4e6 SHA-1: 0c2bf9614e625e599f8cdb3dc06cf18d6a12decc SHA-256: 6a1bca8c0e800ed98b20a151bdc24ee5805699f1858e4f95a61378295fe53dba
168 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains an embedded XFA script that exploits the CVE-2010-0188 vulnerability in Adobe Reader. The script is heavily obfuscated but appears to be JavaScript, intended to download and execute a second-stage payload.

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_00000359.bin
b2059c01871f3bc66a0ad5e59b84655aee7f2209016d097cc04c57838b576576
pdf-embedded-script PDF raw stream script payload at offset 0x359 15901 bytes