PDF malware analysis — malicious · 4a42cd27fd08be26

MALICIOUS

PDF

31.4 KB

MD5: f295a824985a2ddb064ce04db5050ac6 SHA-1: 51634383eeff0e1da1386d1e700764f72606fe8c SHA-256: 4a42cd27fd08be26a39fbf095a3e972af3453b3b9523e61dd1fb3d94fbc2f38f

172 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.007 JavaScript

The PDF file contains an XFA form that triggers a known exploit (CVE-2010-0188) in Adobe Reader. A JavaScript stager, recovered from the XFA form, is also present and likely responsible for downloading and executing a second-stage payload. The embedded URL is likely related to the XFA schema and not directly malicious, but the exploit and stager are strong indicators of malicious intent.

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.
ClamAV: Js.Exploit.HTML-30 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Js.Exploit.HTML-30
XFA numeric JavaScript stager high PDF_XFA_NUMERIC_JS_STAGER

PDF XFA script reconstructs a hidden JavaScript stage from numeric field data or a character table, then evals the result. The decoder is gated on XFA script, numeric staging, and recovered exploit-like JavaScript or shellcode markers.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xfa_numeric_stage_000.js` `bdfdff0ab512690c29091f8b922574e9b8dce4ba1826844f3dc4a7d904c613cd`	deobfuscated-js	XFA rawValue numeric decoded JavaScript (raw) at offset 0x3F0	3735 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).

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