Js.Trojan.Agent — PDF malware analysis

Static analysis result for SHA-256 77951b99ac8744cd…

MALICIOUS

PDF

9.6 KB
MD5: f0e9e62d8eb114e298e2eed36e176b06 SHA-1: d937d22695f8881ce4144026784beb448d193d2c SHA-256: 77951b99ac8744cd5d406b1292873f7cc49b9b01453aa8a030d9b8a78405894e
166 Risk Score

Malware Insights

Js.Trojan.Agent · confidence 95%

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.001 Phishing: Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF file contains an embedded script payload and triggers a critical heuristic for CVE-2010-0188, indicating an exploit attempt. ClamAV detection confirms it as Js.Trojan.Agent-36967. The embedded URL, while not directly malicious in reputation, is part of the XFA structure exploited.

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
615c6b811673fe89aec3d476d28094f192d9f5c125fff33fd9e15108df17ddb4		 pdf-embedded-file PDF EmbeddedFile object 111 at offset 0x112D 52247 bytes
embedded_file_obj0044.bin
3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169		 pdf-embedded-file PDF EmbeddedFile object 44 at offset 0x212B 144 bytes
embedded_file_obj0045.bin
10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275		 pdf-embedded-file PDF EmbeddedFile object 45 at offset 0x21D8 77 bytes

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