Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8f78e41758eb31…

MALICIOUS

PDF

99.7 KB
MD5: 9fb18ea2812a4d5a4c9c7a369116cfed SHA-1: b506d25955f106715f2fc0a37549c42d9007707b SHA-256: 9a8f78e41758eb314182aa2a488cb52e4ba45196fb9ba9e10e7c999cd8b8c3af
136 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is a PDF document that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to LibTIFF and XFA forms. The heuristic firings indicate an embedded script payload within an XFA form, which is characteristic of exploit delivery. The embedded URLs, while mostly benign or unknown, are part of the document's structure and do not directly indicate a malicious payload delivery mechanism in this case. The primary attack vector is the exploitation of the CVE-2010-0188 vulnerability for client-side code execution.

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
d7b351987b605703d8bc8fc5a522ec24fd30f6f0a036af49f65342efd262de3e		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101347 bytes

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