PDF malware analysis — malicious · 2567d0094bfb118d

MALICIOUS

PDF

4.3 KB

MD5: 9b78e6830cc9f23bd905e074e4477905 SHA-1: 2b1c99f692a823e50bce5dc0a87a9203083377d9 SHA-256: 2567d0094bfb118d4f6ee51c693a17792a69ab29fc54a6151cbae11f63856512

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream exhibits obfuscation and utilizes eval() and String.fromCharCode(), suggesting it's designed to execute arbitrary code. The primary function of this script appears to be downloading and executing a secondary payload, as evidenced by the obfuscation indicators and the presence of a JavaScript object. The extracted file name 'javascript_obj724160_000.js' is included as an IOC.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
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. (matched inside decoded stream)
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_obj724160_000.js` `ae73f14c38dfff4956c5a13f7556af7172e0f70c3c700ad032d7898767c12962`	pdf-javascript-stream	PDF /JS object 724160 at offset 0x138	8318 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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