Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ef39e68d88f05e…

MALICIOUS

PDF

99.7 KB
MD5: d165323aea2d21371faf037e02f8bd34 SHA-1: 443d9fac883f66441074126291cc387af57a5bcd SHA-256: 20ef39e68d88f05e6874aa868835d309d7ee8c9e07d5adeafd4d820f16516971
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1204.002 Malicious Link: Clickjacking T1204.003 Malicious Link: Malicious File T1059 Command and Scripting Interpreter

The PDF file contains embedded XFA forms and scripts, indicating an attempt to exploit vulnerabilities. Specifically, the CVE-2010-0188 heuristic firing suggests the exploitation of a LibTIFF vulnerability within Adobe Reader. The embedded script payload further supports the malicious intent, likely to download and execute a secondary payload.

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
ebb87bd756620984c506665d82cfd12ad385474b67f36e738a8d56d0c9bc1a81		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101329 bytes

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