Malicious PDF — malware analysis report

Static analysis result for SHA-256 988e4ab422d0dc80…

MALICIOUS

PDF

81.8 KB
MD5: 26aaf565ac94b4dfdc05a7e741b67528 SHA-1: 5b17139e618dffd5e2ffa44c37a294038953ff07 SHA-256: 988e4ab422d0dc80288aadc40a277b22239c6c2e8d150e81dae6ea8e4150005a
158 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.001 PowerShell

The sample is a PDF file that exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms. The heuristic firings indicate an embedded script payload within a PDF stream, which is consistent with exploit delivery. The embedded URLs, while mostly benign or unknown, are part of the XFA structure. The primary attack vector is the exploitation of the PDF reader itself to deliver a malicious payload, as indicated by the ClamAV detection name 'Pdf.Exploit.Dropped-93'.

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.
  • ClamAV: Pdf.Exploit.Dropped-93 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-93
  • 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_pdf_script_0000038b.bin
e6af5a3cc971f4ce96c893decd197a94ff65dd2b8b0e2d6e1f4a1a0dc3b0587f		 pdf-embedded-script PDF decompressed stream script payload at offset 0x38B 70546 bytes

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