PDF malware analysis — malicious · bf218d292304e119

MALICIOUS

PDF

51.8 KB

MD5: 6b81c8af54fbd6c58ad48ad6ddcbfc54 SHA-1: f6df744e414d85f0b60b2a5fd4cd0ca6f016c27d SHA-256: bf218d292304e1197fdc0d1e8107fc2bc880891ebce0a880f40b7e114a58f47e

268 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.007 JavaScript

This PDF file exploits CVE-2010-0188 via XFA forms to execute a JavaScript stager. The stager, identified as 'xfa_numeric_stage_000.js', is responsible for downloading and executing a second-stage payload. The embedded URL is likely related to the XFA template but may also be used in the attack chain. ClamAV detections further confirm the malicious nature of the file and its extracted components.

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` `b9188502addff884a4447fe5226b657395d09119b28e816df3f83bbd660c41b8`	deobfuscated-js	XFA replacement character-table decoded JavaScript (raw) at offset 0x30C	3759 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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