PDF malware analysis — malicious · 3a022e3e381ab116

MALICIOUS

PDF

38.9 KB

MD5: 202b2d1af6b876c162b3399cce22bb34 SHA-1: 5cf1cb3aa261e502d59492d8b2eb821ca54c43d3 SHA-256: 3a022e3e381ab116c3d0f12d2e7a9b0c5e400a6279fc7e7a462164ee201aa4cb

172 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains XFA (XML Forms Architecture) data which is known to be a vector for exploits. Specifically, the CVE-2010-0188 heuristic indicates a vulnerability in Adobe Reader related to LibTIFF and XFA. The embedded JavaScript stager, xfa_numeric_stage_000.js, was detected by ClamAV as Js.Exploit.HTML-30, suggesting it's designed to exploit browser or PDF reader vulnerabilities. The primary intent appears to be downloading and executing a second-stage payload, as indicated by the stager nature of the script.

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` `67998ef6d88486750f1ff54e99afcf52757650d40de4840a687e047af138f8c8`	deobfuscated-js	XFA rawValue numeric decoded JavaScript (raw) at offset 0x33D	3767 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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