PDF malware analysis — malicious · 306a74fab0d34900

MALICIOUS

PDF

38.8 KB

MD5: 4a2d88f0633afb569be293fbc03284ce SHA-1: deb494536d9d7f7a7b0e752f2eb59eb577a6833c SHA-256: 306a74fab0d34900c7f58a41da02a1ce7f1aea1f78d97afd0ee11e3a0463cc2d

268 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: JavaScript

This PDF file contains XFA (XML Forms Architecture) content that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to LibTIFF processing. The heuristic 'PDF_XFA_NUMERIC_JS_STAGER' indicates that a JavaScript stager was recovered, which is further confirmed by the ClamAV detection 'Js.Exploit.HTML-30'. This stager likely downloads and executes a second-stage payload. The embedded URL is likely related to the XFA template structure.

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` `48dc52e622c7ae69e30323720f8d26a841c760d45e08110478989586ace243c6`	deobfuscated-js	XFA rawValue numeric decoded JavaScript (raw) at offset 0x347	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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