Malicious PDF — malware analysis report

Static analysis result for SHA-256 885cfbee3a826b51…

MALICIOUS

PDF

99.8 KB
MD5: f1e742a55c26927a1d85cd53103ebecf SHA-1: 85058209285d297ea0a64a32b213baac9495ed96 SHA-256: 885cfbee3a826b5166107ccde10eefc49229f0eb5b24984fd5d66aeffc198f81
138 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1566.002 Phishing: Spearphishing Link

The PDF file contains embedded XFA forms and scripts, indicating it is designed to exploit vulnerabilities. Specifically, the 'CVE_2010_0188' heuristic firing points to the exploitation of the LibTIFF XFA image vulnerability in Adobe Reader. This exploit likely leads to the execution of a secondary payload, although the exact nature of that payload cannot be determined from the provided evidence.

Heuristics 6

  • 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 executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose dataset contains a <script> or <xfa:script> block — XFA scripting has been the exploit primitive for several Adobe Reader RCEs (CVE-2010-0188 family, CVE-2018-4901, and others). Plain XFA without scripts is far less risky.
  • 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
b3c256c57957de9027f49dbd3bb96c4d9a0bd5d1e46d4e50d4a2fcf0b9f94f47		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101466 bytes

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