PDF malware analysis — malicious · 29cdc10abd428d03

MALICIOUS

PDF

1.95 MB

MD5: 72ef64aea0c63d3227f14d98bc616a95 SHA-1: dde52006a9331f373245da1610a4328305df3219 SHA-256: 29cdc10abd428d031b850928037994ac033a072c8e3f3150b43b1ba43341e70a

308 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript

This PDF file contains an XFA form that leverages CVE-2010-0188, a known vulnerability in Adobe Reader's LibTIFF component. The embedded JavaScript stager, recovered as 'xfa_numeric_stage_000.js', is detected by ClamAV as Js.Exploit.HTML-30 and is designed to download and execute a second-stage payload. The presence of an embedded script payload and the specific exploit detection strongly indicate a malicious intent for exploitation and further infection.

Heuristics 8

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.
Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00081922.bin` `b9c11b4c0eb3788c847af172b2619d4c28876e51d56abf0d7195905ae3379587`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x81922	2047728 bytes
Detection ClamAV: Js.Exploit.HTML-30 Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`xfa_numeric_stage_000.js` `eccb43f059b1efa82da725ce2765e24e43382ec56e34141b1cadb6b75ac27994`	deobfuscated-js	XFA rawValue numeric decoded JavaScript (raw) at offset 0x348	3803 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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