Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c66e48fbb0256bd…

MALICIOUS

PDF

50.4 KB
MD5: 991fc35a1d89aa1d97b4c3438adf769a SHA-1: 12ae01730f974616ba5ab863bd8dea913c65dbf5 SHA-256: 5c66e48fbb0256bd313cc61573f0a80f366ad76328740a7ecfd0d7a8dc2ec416
216 Risk Score

Malware Insights

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

The file is a PDF document that contains a critical XFA form exploit targeting CVE-2010-0188 in Adobe Reader. This exploit is designed to execute arbitrary code, as indicated by the 'PDF_XFA_SCRIPT' and 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristics. The ML classifier and ClamAV detection strongly support the malicious nature of this file, pointing towards a client execution attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_file_obj0008.bin
995586ee090c6c36d947aa4ea879eda14675522fd1aa9467ce432ca1237f8ebd		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 50827 bytes

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