Malicious PDF — malware analysis report

Static analysis result for SHA-256 835ac745d28cc833…

MALICIOUS

PDF

12.8 KB
MD5: fe65ad28e0178fba5b183dc753a708f4 SHA-1: 2e9f0eb4452258740bc55a6226b016d95080278a SHA-256: 835ac745d28cc833150c9e4149826d0c963b60d9cb218219723db5ea0a875042
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 exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms. Embedded JavaScript within the XFA form is likely responsible for executing the exploit payload, which is typical for this type of attack.

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
d4fb38bbc75ac188c306a94ad4a0b9c78190ee83b9f436deb785b9ad4634c014
pdf-embedded-script PDF raw stream script payload at offset 0x359 12401 bytes