PDF malware analysis — malicious · 0c3357d16ae7f99c

MALICIOUS

PDF

1.3 KB Created: 2011-12-09 16:27:50 -05:00 Authoring application: iText 2.1.3 (by lowagie.com)

MD5: 8012dcdba42333fd46908af97e187507 SHA-1: c55d9d212523e6ef6f4fdcabee01d6f5257b71af SHA-256: 0c3357d16ae7f99ccede0709bfc82f6bdf9a622a81c76771f73763958040e966

148 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

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 (matched inside decoded stream)
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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `ba1f3d86a4787f50d798fcfda97e202e5dc180654d728c426b21f4cfe2f1dba0`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	949 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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