Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26d26341049cf14…

MALICIOUS

PDF

78.9 KB
MD5: 3d2c7809d65eeb55a93aff63322e9c14 SHA-1: 3cdee9e58bc60ea1e6aa71be998fd5d803038f0b SHA-256: b26d26341049cf1441f6c5500934eb7a883dbb1a4feee4f8b83da187b245a92a
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1204 User Execution

This PDF file is identified as malicious due to the presence of an embedded script payload and the critical firing for CVE-2010-0188, an Adobe Reader exploit. The XFA form contains executable script, indicating an attempt to leverage this vulnerability. The embedded file and XFA structure further support the exploit vector. The exact nature of the payload is not fully discernible from the provided script excerpt, but the exploit itself is the primary indicator of malicious intent.

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.
  • 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
debbf95252b75576a4fcf5ebaa25550bdc2ab61c5036f86467b4be6572126d6a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80057 bytes

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