PDF malware analysis — malicious · 5633e984bfc5f83d

MALICIOUS

PDF

31.4 KB

MD5: 2da6e3b208c1314f1a066d038309406e SHA-1: 9300687efe2cead7355b2e1d5dce9f5660066f8c SHA-256: 5633e984bfc5f83db71d5aae16bb17c04127381c45384e8ca27ca8d7b2430790

172 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.001 PowerShell

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 LibTIFF vulnerability within Adobe Reader's XFA processing. The embedded JavaScript stager, recovered as 'xfa_numeric_stage_000.js', is heavily obfuscated but the ClamAV detection 'Js.Exploit.HTML-30' suggests it's malicious. The primary intent appears to be downloading and executing a second-stage payload, as indicated by the exploit and stager heuristics.

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` `b64d21c0efb1891218d9b1b3d59b1c1078bfb5aab8c0293f1c3f1c57084e5af5`	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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