Js.Trojan.Agent-36967 PDF malware analysis — malicious · f4df8721bedfdb8a

MALICIOUS

PDF

9.6 KB

MD5: f04126d47c5ec0db18e39d7165cdbb59 SHA-1: 185bd9f966b2758bfafe724b70c4c6eb8f385ae0 SHA-256: f4df8721bedfdb8a0b8037f29d68652fd386c61dced0631a90efb7cfce10ced1

166 Risk Score

Malware Insights

Js.Trojan.Agent-36967 · confidence 95%

MITRE ATT&CK

T1204.002 User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.007 Command and Scripting Interpreter: JavaScript

The file is a PDF document that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. ClamAV identified the sample as Js.Trojan.Agent-36967. The exploit likely leads to the execution of a malicious JavaScript payload embedded within the PDF, which is a common technique for delivering further malware.

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.

Filename	Kind	Source	Size
`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` `cd6314c5e095d114d9bf1aad2349cdd8f41fb1cd15b1d9f57ca1b51a046ad108`	pdf-embedded-file	PDF EmbeddedFile object 111 at offset 0x112D	52727 bytes
`embedded_file_obj0044.bin` `3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169`	pdf-embedded-file	PDF EmbeddedFile object 44 at offset 0x20E0	144 bytes
`embedded_file_obj0045.bin` `10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275`	pdf-embedded-file	PDF EmbeddedFile object 45 at offset 0x218D	77 bytes

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