Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a3280d3bf8f5d8…

MALICIOUS

PDF

99.8 KB
MD5: f43b4db26814db1664b11a4c735fd082 SHA-1: d63aa34c259df48633b2a09b825154e09c5525ef SHA-256: 02a3280d3bf8f5d8d17c548bd61ce447e351c8875f61394a54c45581a89e0044
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded XFA (XML Forms Architecture) content, which is known to be vulnerable to exploits such as CVE-2010-0188. The heuristic firings indicate that this sample leverages this vulnerability for client execution. While the document body and embedded scripts are heavily obfuscated and truncated, the presence of the XFA exploit suggests the primary goal is to execute arbitrary code, likely to download and run a secondary payload. The benign URLs present do not detract from the malicious nature indicated by the exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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 script payload in PDF stream low 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 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
d4c10dd1a067dc0d201b7e35ed45402dfce5a5e7a6a7d3b061af719d50ff311d		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101405 bytes

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