Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f9eb7a5dfe1326…

MALICIOUS

PDF

99.9 KB
MD5: fef3d6f8fa7ddd747aaebad4e0e74b09 SHA-1: 8d42def9775508275190b182cbbe72a363194947 SHA-256: 26f9eb7a5dfe132622db7a83e40922229b97266078ba802fff20051e94cb09c2
96 Risk Score

Malware Insights

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

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. This exploit allows for arbitrary code execution. The PDF also contains embedded script payloads and embedded files, indicating a multi-stage attack. The embedded URLs, while not directly malicious, are related to XFA schemas and Adobe, suggesting the document is designed to leverage these components for exploitation.

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 script payload in PDF stream medium 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 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 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
9e98b9e8aaeaa7f2e88e36224630410fb9133676f367d6c19d8aedd7da802923		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101534 bytes

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