Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8a149ecf4149dc…

MALICIOUS

PDF

82.7 KB
MD5: f93bda7376a0d7f68037bfd291f160a8 SHA-1: 0ddb44ffb996e7992e96f3da93a010d71987b485 SHA-256: ee8a149ecf4149dc4a2b4bedfd282da6103055a769d6fa534904a58b8f6cf045
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059 Command and Scripting Interpreter T1190 Exploit Public-Facing Application

The sample is a PDF file that leverages the CVE-2010-0188 exploit targeting Adobe Reader's XFA forms. The critical heuristic firings indicate the presence of an exploit and an embedded script payload within the XFA structure. This exploit likely facilitates the download and execution of a secondary malicious payload, as suggested by the ClamAV detection 'Pdf.Exploit.Dropped-93'. The embedded URLs, while not directly malicious, are related to XFA and could be used in the exploit chain.

Heuristics 7

  • 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.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_file_obj0008.bin
9102ca2fc137c1a6685f38648b0ec4c6ef861149317da81d9b174126e6fe3848		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 83924 bytes

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