PDF malware analysis — malicious · db779b34e465f2f6

MALICIOUS

PDF

11.4 KB

MD5: 184d954a990f6ab8f5addc1258f3cd67 SHA-1: 3fbc045ab8510addc5c5a66b59242f99de67780c SHA-256: db779b34e465f2f660bc6cf4bf00bf5ef69c092c38ecbce0a9960c82a59fec2f

86 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: JavaScript

The PDF file contains an embedded XFA form that triggers a known vulnerability, CVE-2010-0188, in Adobe Reader. This vulnerability is used to deobfuscate and execute JavaScript. The deobfuscated JavaScript is likely responsible for downloading and executing a second-stage payload, as indicated by the heuristic 'EXTRACTED_FILE_STATIC_TRIAGE' which flagged a long encoded blob and script obfuscation indicators. The embedded URL is likely related to the XFA form 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.
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
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
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 6

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 0xEED	85 bytes
`embedded_file_obj0042.bin` `dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91`	pdf-embedded-file	PDF EmbeddedFile object 42 at offset 0xF9F	1029 bytes
`embedded_file_obj0095.bin` `7c50a6b9fcf83aeed4cadf4f3c78fb220467adb46374b287e474e32dfbf3d267`	pdf-embedded-file	PDF EmbeddedFile object 95 at offset 0x11B8	13229 bytes
`embedded_file_obj0044.bin` `3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169`	pdf-embedded-file	PDF EmbeddedFile object 44 at offset 0x28FB	144 bytes
`embedded_file_obj0045.bin` `10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275`	pdf-embedded-file	PDF EmbeddedFile object 45 at offset 0x29A8	77 bytes
`xfa_base26_stage_000.js` `80fc75c431813d5ad61ce65a38ffe3d54aff9d7d01521e42cb4a67278362898e`	deobfuscated-js	XFA base-26 decoded JavaScript (decompressed) at offset 0x1726	4464 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

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