PDF malware analysis — malicious · 26fbed62b1408f09

MALICIOUS

PDF

31.4 KB

MD5: ef19446e312ebad3b804eecf267dfb99 SHA-1: 00c3c897b0e50affae374d92f81d855336a0d1ca SHA-256: 26fbed62b1408f0914c489f18a34b829d5556e5b3c44755eb72dc0b375d929e2

172 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.007 JavaScript

The PDF file contains XFA (XML Forms Architecture) content, which is known to be a vector for exploits. Specifically, the 'CVE_2010_0188' heuristic indicates exploitation of a vulnerability in Adobe Reader related to LibTIFF and XFA. The 'PDF_XFA_NUMERIC_JS_STAGER' heuristic recovered 3759 bytes of deobfuscated JavaScript, suggesting the stager's purpose is to download and execute a second-stage payload. ClamAV also detected this as 'Js.Exploit.HTML-30'.

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` `728ac235527c5be098afdf5bba5fff1f000a3501e67bd6eb49dabf242b0c8f1f`	deobfuscated-js	XFA rawValue numeric decoded JavaScript (raw) at offset 0x348	3759 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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