PDF malware analysis — malicious · 408d11d0b5b9e85f

MALICIOUS

PDF

5.2 KB Created: 2008-12-03 13:57:41 UTC

MD5: 41e612a45888673183275018caa2ebba SHA-1: 79ddf49866a7ee5463aca2f794cbf50f65728c88 SHA-256: 408d11d0b5b9e85ffe8e3a18f7f5a73f38c5aa104d34cceda084a03eb360d120

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream includes an eval() call and uses String.fromCharCode, suggesting obfuscation. This obfuscated JavaScript is likely responsible for downloading and executing a second-stage payload. The extracted artifact 'javascript_obj0006_000.js' further supports the presence of malicious JavaScript. Due to the obfuscation, the exact payload and delivery mechanism cannot be definitively determined, hence the confidence level.

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_obj0006_000.js` `0cdf1bf5abdb6558316c3d895dbdb8dc3411e810a8b6bf68114047d8e7885403`	pdf-javascript-stream	PDF /JS object 6 at offset 0xB4	8764 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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