PDF malware analysis — malicious · 5a10f2697bce0e9c

MALICIOUS

PDF

51.4 KB

MD5: a76599df01a954773bf42ce59c39ae98 SHA-1: 9c854968fbb92779baa3207b01925d20c622ae1c SHA-256: 5a10f2697bce0e9c5538eaab3f994ce7ea65b28ac073ef18e564521a2ef2784a

230 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.007 JavaScript

The PDF file contains an XFA form that leverages the CVE-2010-0188 vulnerability in Adobe Reader. A deobfuscated JavaScript stager was recovered, which is detected by ClamAV as Js.Exploit.HTML-30. This script likely downloads and executes a second-stage payload, indicated by the 'unknown_exploit_score' and the 'Pdf.Exploit.Agent-36962' detection on an extracted artifact. 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.
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` `231e1115c20d683f5f37f29301f9199f9e7f7ca23fffdcc105cc0b79352f0767`	deobfuscated-js	XFA replacement character-table decoded JavaScript (raw) at offset 0x30C	3739 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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