Malicious PDF — malware analysis report

Static analysis result for SHA-256 94739d1a60d4e4e1…

MALICIOUS

PDF

66.1 KB
MD5: 22e0cb38ce4cc7f94c01b22dca54e52c SHA-1: 36c2b20a7d872d8c117f00deb5594436091c5c93 SHA-256: 94739d1a60d4e4e1c57b76d0a0d2019de85853d552d88af200d1ad42af23c120
138 Risk Score

Malware Insights

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

The PDF sample contains an embedded XFA form that is exploited via CVE-2010-0188, a known vulnerability in Adobe Reader's LibTIFF processing. This exploit allows for arbitrary code execution. The embedded script payload within the XFA form likely facilitates the download and execution of a second-stage payload, although the exact functionality is obscured. The presence of embedded URLs, while not directly malicious, are part of the XFA structure.

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
8f4a3e5c075b20e8a1855140302fa4026fa5ea4c63d3b0877027aa0678e67c34		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 66938 bytes

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