Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ef5c7756e47773…

MALICIOUS

PDF

16.1 KB
MD5: 8a0cdad344ee96a62a5f8de09e469458 SHA-1: 9466d449e493d4c1da76cb71c17ab8c809280a63 SHA-256: 28ef5c7756e4777321e3d05c57f5b07ab45d0a9a75f7c1cccfb1ccca2f1d4390
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The file is a PDF document that leverages the CVE-2010-0188 exploit targeting XFA forms and LibTIFF parsing within Adobe Reader. This exploit is designed to execute embedded scripts, which are present in this sample. The embedded script is likely responsible for downloading and executing a second-stage payload, although its exact functionality is obscured by the exploit's nature. The presence of the XFA exploit and embedded script strongly indicates a malicious intent to compromise the user's system.

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_00000354.bin
72f18e476334c2da8038349edba5e4a4bbf434d1c9071046e51a2f642d18745c		 pdf-embedded-script PDF raw stream script payload at offset 0x354 15752 bytes

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