PDF malware analysis — malicious · 64082b1f070a872c

MALICIOUS

PDF

8.9 KB Created: 2010-02-14 17:58:02 Authoring application: wNhnPbrhDXGJX (via VKLJitwlrcQoUOMJR)

MD5: 589f1e2c8b691dd756414df0d9528863 SHA-1: 22117ea7b6e8ceb2f8b2d15f7f6f1cdf9be5c677 SHA-256: 64082b1f070a872ceab9daa34955595f16ef7ba041899a4b1f0a836efe4b40a3

176 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains embedded JavaScript that is flagged as an exploit cluster. The JavaScript is heavily obfuscated but appears to be designed to download and execute a secondary payload, as indicated by the heuristic firings and the ClamAV detection name 'Pdf.Exploit.Agent-35572'. The ML classifier also strongly indicates maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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.
ClamAV: Pdf.Exploit.Agent-35572 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35572
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `570d407427326e0de1be7c0a25e3b2623f7b291021a309f8673c044d01daebfc`	pdf-javascript-stream	PDF /JS object 7 at offset 0x52C	7020 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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