PDF malware analysis — malicious · 38b0a023cee781c1

MALICIOUS

PDF

52.0 KB

MD5: 8e631802a5a8f6f595272b637bb0683e SHA-1: 2baa08bcde0c69dda465ee90f4bab92e2affd7e0 SHA-256: 38b0a023cee781c17af7e2502edde04d607a63c0248d6adf9899d196cf898433

230 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1059.007 Exploitation for Client Execution: JavaScript

The PDF file contains an XFA form that exploits CVE-2010-0188 in Adobe Reader. A JavaScript stager was recovered from the XFA payload, which is likely responsible for downloading and executing a second-stage payload. ClamAV detections further confirm the malicious nature of the file and its extracted artifact.

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/ In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xfa_numeric_stage_000.js` `5cbd8f7c64971a685db93016c1171ee4c5c5348d3789b8a53f3c7deb18f60fe0`	deobfuscated-js	XFA replacement character-table decoded JavaScript (raw) at offset 0x30C	3763 bytes
Detection ClamAV: Pdf.Exploit.Agent-36962 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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