Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf3e054cb8b7044…

MALICIOUS

PDF

121.9 KB
MD5: addd7eeb36362fc4d4d46d3cb5641648 SHA-1: 76ce3cc914686a3a217da27347d89e5bc52b514f SHA-256: eaf3e054cb8b704492292368be09eeaaa8ae3f17762b8f5e82ca96668f5a63d9
196 Risk Score

Malware Insights

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

This PDF file exploits CVE-2010-0188, a vulnerability in Adobe Reader related to LibTIFF and XFA forms. The critical heuristic firing indicates that the exploit payload was decoded from a raw stream within the XFA form. The PDF also contains an embedded script payload, further supporting its malicious nature. The embedded file and the exploit suggest the document is designed to download and execute a second-stage payload.

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-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
ead4db51f588b63f609291d44b659b23e40793e98dbc54926166aff52fde48cd		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 124039 bytes

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