PDF malware analysis — malicious · ac5f4cf295f4e400

MALICIOUS

PDF

24.3 KB

MD5: 7f3a3db2650272badaf4946a423caf0f SHA-1: b4df224661fcf069581e0d205c1ff47d9e64c652 SHA-256: ac5f4cf295f4e400f3d484354359c3c910759c0e3c0430f090ea7b11db38721a

230 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains an XFA form that leverages the CVE-2010-0188 vulnerability in Adobe Reader. A critical heuristic identified an XFA numeric JavaScript stager, which is further confirmed by ClamAV detections (Js.Exploit.HTML-30 and Pdf.Exploit.Agent-36962). The stager likely downloads and executes a second-stage payload. The embedded URL is likely related to the XFA schema but may also be used in the exploit chain.

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.
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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xfa_numeric_stage_000.js` `092125b0998694a4fe7a917606e4950cefce8a975ebb0615fb341a2609aa386d`	deobfuscated-js	XFA rawValue numeric decoded JavaScript (raw) at offset 0x3A8	3767 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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