PDF malware analysis — malicious · 34b8a18043acfbac

MALICIOUS

PDF

96.1 KB

MD5: 0497443ad5181ee953f5226b1e552ceb SHA-1: dfa6667d97f329e7c17a6f5fd45e5a87bd9c2893 SHA-256: 34b8a18043acfbaced96331bc28d8f8ea202be47bef86562deb2411202112f6f

230 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains an XFA form that leverages the CVE-2010-0188 vulnerability in Adobe Reader. Static analysis identified a JavaScript stager within the XFA form, which is designed to download and execute a secondary payload. ClamAV detections further confirm the malicious nature of the file and an extracted artifact. The embedded URL is likely related to the XFA template but does not appear to be the direct download source for the payload.

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: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
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` `7f591ece231010794bd1ecd81a5a4337e5fa8df28085db935eef78276f8b76c5`	deobfuscated-js	XFA character-table decoded JavaScript (raw) at offset 0x2EB	3750 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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