Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99272b85a6b54ad…

MALICIOUS

PDF

12.8 KB
MD5: 83056fbf2ba6aa39a472f3f1611b4f2b SHA-1: 0860bdbf02b63cdcdec2c5b20b0212ebee59b04e SHA-256: f99272b85a6b54add0fed65a436f7ebd8bde8db7e2d7862de120dfd6680271b3
188 Risk Score

Malware Insights

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

The PDF file contains an XFA form which is known to be vulnerable to exploits. Specifically, the CVE-2010-0188 heuristic indicates an exploit targeting LibTIFF within XFA forms. An embedded script payload was also detected, suggesting the exploit is used to download and execute a second-stage payload. The embedded URL, while seemingly benign, is associated with the XFA schema and may be a lure or part of the exploit chain.

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_00000384.bin
b943c5f6bb0e67aaabdbbc1550d6b6be8d3d11fe1f9dc203223079bc51d6ea0d		 pdf-embedded-script PDF raw stream script payload at offset 0x384 12288 bytes

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