Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa75bf821c1dd10…

MALICIOUS

PDF

99.9 KB
MD5: 963bc61e4aebaf0e9de90b122d2ae703 SHA-1: 5c16f72e191ea6d09c3d255ac33c2ded6d843ac5 SHA-256: 8fa75bf821c1dd1044fab7e6876488f910344efc1b1d71e15ec98fdb162d6383
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious PDF T1059.001 Command and Scripting Interpreter: PowerShell T1566.001 Phishing: Spearphishing Attachment

The sample is a PDF file that exploits CVE-2010-0188 in Adobe Reader. The XFA form contains executable script which is likely responsible for delivering the exploit payload. The embedded file and script payload heuristics indicate the PDF is designed to download and execute further malicious content.

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
76d8febb24dae7f5ba22da7b8a4e3f37b2ce9a06cf115d663c9668b6e8dbd2d0		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101504 bytes

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