PDF malware analysis — malicious · 91a56fb465629b7c

MALICIOUS

PDF

97.7 KB

MD5: 232a07dd252cbe850530319c3c7d2ecc SHA-1: 44d833f304b0cca2c5bfc923420aaf13e80e5068 SHA-256: 91a56fb465629b7cf113c90e17911fff9bd2ae0c672685b61d057e530bd48a67

172 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms and LibTIFF. The heuristic firings indicate that the PDF contains obfuscated JavaScript, likely acting as a stager to download and execute a second-stage payload. The embedded URL is likely related to the XFA template, but the primary malicious activity stems from the exploit and the deobfuscated JavaScript.

Heuristics 6

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
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` `d742fd0011aababa1f99cd7369613d9cec2cceae5dd603885e8a0228adb292ed`	deobfuscated-js	XFA character-table decoded JavaScript (raw) at offset 0x2EB	3798 bytes
Detection ClamAV: No threats found 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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