Malicious PDF — malware analysis report

Static analysis result for SHA-256 1666f7d39abd3adf…

MALICIOUS

PDF

90.3 KB
MD5: 2a3c18c5c1cc6df4a0ca996fe5ef7ef4 SHA-1: 2e978b2e65b248f42ff2dbcf11550bbdd838ae3f SHA-256: 1666f7d39abd3adfa2ab7e29e706daa3a7246844fb5d360401278a8c1ed86ff4
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF sample contains an embedded XFA form and triggers the CVE-2010-0188 exploit, which is known to facilitate arbitrary code execution. This indicates the file is designed to exploit a vulnerability in Adobe Reader to deliver a malicious payload. No specific family could be identified, but the exploit mechanism is clear.

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.
  • 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
6deb6c6966f100693b683be5fa38f7b8db6efc771951d700ec9749949100952d
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 91708 bytes