PDF malware analysis — malicious · b021b4e1a9a9a5fb

MALICIOUS

PDF

38.7 KB

MD5: 27f27ae41f300549fc1f72cbefd97eb9 SHA-1: d7776f47c0e5841837669f0829f7e8bdb5fe39c2 SHA-256: b021b4e1a9a9a5fbd6b0f67f55fafc557a0327d9edfab1ed610ff9c4220216a6

172 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript/JScript

This PDF file exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms and LibTIFF. The embedded JavaScript stager, recovered as xfa_numeric_stage_000.js, is detected by ClamAV as Js.Exploit.HTML-30. The script likely downloads and executes a second-stage payload, indicated by the heuristic firings and the nature of XFA exploits.

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` `2ac267eee90140a93b31a38f26a96d9fc18b64aab17ae1497ee06734cd138f77`	deobfuscated-js	XFA rawValue numeric decoded JavaScript (raw) at offset 0x347	3743 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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