PDF malware analysis — malicious · d73a2f9cf0aa203a

MALICIOUS

PDF

17.9 KB

MD5: 5e4d9bf39478d76cfa48bf68b17b8915 SHA-1: eebe966859cd27f093cfde52b98b1575df063d3a SHA-256: d73a2f9cf0aa203af457d6cf4c77d31eb0911bb34df919c0cf73b23901fb1b5a

268 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell T1059.003 Windows Command and Shell

The PDF file contains XFA (XML Forms Architecture) which is known to be a vector for exploits. Specifically, the CVE-2010-0188 heuristic indicates an exploit targeting Adobe Reader's LibTIFF component via XFA JavaScript. The ClamAV detections 'Js.Exploit.HTML-30' and 'Pdf.Exploit.Agent-36962' on the file and an extracted artifact further confirm its malicious nature. The extracted JavaScript, 'xfa_numeric_stage_000.js', likely acts as a stager to download and execute a second-stage payload, although its exact function is obscured.

Heuristics 7

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
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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.
Suspicious extracted artifact high 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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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` `7a339c18081ec465b9666c17824dd29afaa782fc1f6eeb9a6a9717e96835e9a9`	deobfuscated-js	XFA replacement character-table decoded JavaScript (raw) at offset 0x2F0	3751 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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