Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef5932bef07fa63…

MALICIOUS

PDF

99.5 KB
MD5: cfae1b2bbf16e905f0d8b2c0afb69fa2 SHA-1: 4290ce982815583d2b1bf4345dfbadbf9beeedd4 SHA-256: 7ef5932bef07fa6343cc1da5e508a25e80c2e596a441ac2406d90c5a7154f8dd
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 sample is a PDF document that leverages the CVE-2010-0188 vulnerability in Adobe Reader. This exploit is designed to execute arbitrary code, indicated by the critical heuristic firing for the XFA image exploit. The PDF also contains embedded scripts and an embedded file, suggesting a multi-stage attack. The exact nature of the payload is not discernible from the provided evidence, but the exploit itself is the primary indicator of 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
0b05f0ea4feab2b7581779cb1d335c52bdd6700bdc89c3146479ae6c2f24fb83		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101091 bytes

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