Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7be85c0b95f2e22…

MALICIOUS

PDF

79.5 KB
MD5: a5f75698129f12de70d083567948f0c6 SHA-1: e5034007f64c43f2d256597943a7d3944f20db22 SHA-256: d7be85c0b95f2e2244e6ba0162a52329599c4798518c36108205b9d880e4e60a
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 critical heuristic firing indicates that the XFA payload was decoded from a raw stream, suggesting the execution of arbitrary code. No scripts were extracted, and the document body was truncated, but the exploit itself is sufficient to classify this as malicious. The embedded URLs are related to XFA schemas and Adobe, but their reputation is unknown or benign.

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
177fac485657b4668c330350c7477dd5b23158502f1438e52bc193b308c1f22b		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80653 bytes

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