Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa54c437455b9a9c…

MALICIOUS

PDF

12.9 KB
MD5: f5bb35fb58a1ba9c07c4ea9f2f2c237d SHA-1: 83898f72e85d8f1a44beb9cd0752fe2a0ca93991 SHA-256: aa54c437455b9a9c8a0bea9742aee56741ad2539280a5c0d7e46f631b597ce54
188 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The PDF file contains an XFA form with an embedded script, which is indicative of exploitation. The heuristic firings strongly suggest the use of CVE-2010-0188, an Adobe Reader LibTIFF XFA image exploit, to achieve arbitrary code execution. The embedded script is likely responsible for downloading and executing a second-stage payload, although its exact functionality is obscured by the PDF structure. The embedded URL is likely related to the exploit or payload delivery.

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.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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.
  • 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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000359.bin
e0a6d53268377b228eb7185915044a5d5c9ed292d20bf9f061f034a622a621a6		 pdf-embedded-script PDF raw stream script payload at offset 0x359 12461 bytes

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