Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7a991410ed905c…

MALICIOUS

PDF

99.7 KB
MD5: a8d5e443a48011c7f549f2d5b3352f14 SHA-1: 7fb928efd7e5a9b905072c174c7ce450762eb6c2 SHA-256: 9a7a991410ed905cb2092e63ae58fa1b3b8a7af37faf489a0ac8913813d49493
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded XFA forms and scripts, triggering heuristics for PDF_XFA_SCRIPT and PDF_EMBEDDED_SCRIPT_PAYLOAD. The critical heuristic CVE_2010_0188 indicates exploitation of a known Adobe Reader vulnerability. The embedded script, though obfuscated, likely attempts to download and execute a second-stage payload, which is a common technique for initial access.

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
aee2533f86bf15c7a8a6a11bc1486a50b61dc132bbcc7c170ad2ef7d6865a51c		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101369 bytes

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