PDF malware analysis — malicious · 03302a8c55d462fe

MALICIOUS

PDF

1.25 MB Created: 2010-07-29 11:32:32 Authoring application: Scribus 1.3.3.14 (via Scribus PDF Library 1.3.3.14)

MD5: 463a2fdfe8757270b204a18f1da7f858 SHA-1: 32415094f419f5bf54ada4ec7f17f164683b15a5 SHA-256: 03302a8c55d462fe67cc076ac8dfaca999efefa8e344bf06aa3ede78b4a97d91

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript streams that are heavily obfuscated and utilize functions like unescape() and String.fromCharCode(). The critical PDF JavaScript exploit cluster heuristic indicates these scripts are designed to exploit vulnerabilities within the PDF reader. The primary purpose of these scripts is likely to download and execute a second-stage payload, although the specific URLs for this are not directly evident in the provided evidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9898

Heuristics 7

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules.
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.monotype.comMonotype
- http://ocsp.verisign.com/ocsp/status0
- https://www.verisign.com/rpa0
- http://www.monotype.com/html/mtname/ms_timesnewroman.htmlhttp://www.monotype.com/html/mtname/ms_welcome.htmlhttp://www.monotype.com/html/type/license.html
- https://www.verisign.com/rpa
- http://crl.microsoft.com/pki/crl/products/CodeSignPCA.crl0
- http://www.microsoft.com/typography
- http://www.iec.ch

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0055_001.js` `40cee9a8b2f97dba5c0346fd76ae8fbe9906fd9146a72588cda248a1c1eb0ab6`	pdf-javascript-stream	PDF /JS object 55 at offset 0x13DBAE	10872 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 8 eval/decoder/string-building token(s).
`javascript_obj0055_002.js` `c2e880ea94d183e605c1880a71b74dee6112428b78c497c201c3ba4de8a6ca42`	pdf-javascript-stream	PDF /JS object 55 at offset 0x13DBD2	12365 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 8 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.