Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c873b7e3efb6ed5…

MALICIOUS

PDF

99.9 KB
MD5: d1dc1c5bec4d840708c75d7a7a2f8fc0 SHA-1: d31c8d61236ec969994e43f87c2ae8cfc714a383 SHA-256: 4c873b7e3efb6ed53e994353644e05ccf247063b25f99ae4e3fd5f6df2baa84f
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1204.002 Malicious Link: Clickjacking T1059 Command and Scripting Interpreter T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded XFA (XML Forms Architecture) data, which is exploited via CVE-2010-0188. This vulnerability allows for the execution of arbitrary code, indicated by the 'PDF_XFA_SCRIPT' and 'CVE_2010_0188' heuristics. The embedded script likely downloads and executes a second-stage payload. The presence of embedded files further supports the malicious intent.

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
c2be6f6bdeec7c730952190bc359ac331af874e4ec02d15bcf97dd5784a7a214		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101599 bytes

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