Js.Trojan.Agent-36967 — PDF malware analysis

Static analysis result for SHA-256 2242e8b4ff73e0f6…

MALICIOUS

PDF

9.5 KB
MD5: 3095de97ede0a17b828b7953b9d79f13 SHA-1: 68a88f8492d85c0391c6601bbc6765411543a8bf SHA-256: 2242e8b4ff73e0f6d534ac55ec0eb1eb4cb69e4aacfeb8d2239100c1320e6dd3
166 Risk Score

Malware Insights

Js.Trojan.Agent-36967 · confidence 95%

The PDF file contains an embedded JavaScript payload and exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms. The ClamAV detection confirms this as Js.Trojan.Agent-36967. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, indicated by the heuristic 'PDF_EMBEDDED_SCRIPT_PAYLOAD'. The presence of an embedded file and an XFA form further supports the exploit vector.

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.
  • ClamAV: Js.Trojan.Agent-36967 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Js.Trojan.Agent-36967
  • 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
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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://www.xfa.org/schema/xfa-locale-set/2.1/

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0041.bin
c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb		 pdf-embedded-file PDF EmbeddedFile object 41 at offset 0xE61 85 bytes
embedded_file_obj0042.bin
dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91		 pdf-embedded-file PDF EmbeddedFile object 42 at offset 0xF13 1029 bytes
embedded_file_obj0111.bin
50878b7f0220ad181eb8c5355c97260acb1bd72efe63769c5418032a4a8f150c		 pdf-embedded-file PDF EmbeddedFile object 111 at offset 0x112D 52295 bytes
embedded_file_obj0044.bin
3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169		 pdf-embedded-file PDF EmbeddedFile object 44 at offset 0x20BA 144 bytes
embedded_file_obj0045.bin
10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275		 pdf-embedded-file PDF EmbeddedFile object 45 at offset 0x2167 77 bytes

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