PDF malware analysis — malicious · 4e0d33882fd03006

MALICIOUS

PDF

3.8 KB

MD5: 32df5bbd45f3e58925b5159f2990b83d SHA-1: 46a29828232312eae7a65f5e0caace4a6dd09442 SHA-256: 4e0d33882fd030062ecd69ca5ddeb810134928693e3c3229055f9725aca31b41

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The eval() call and String.fromCharCode usage within the JavaScript streams suggest the execution of obfuscated or dynamically generated code. While the exact payload is not immediately clear due to obfuscation, the presence of these elements strongly points to a malicious intent, likely to download and execute a secondary payload or exploit a vulnerability.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `50875da35fa74ee7679fa3a362b2ce5ee890500d24d2ebbb248ffb8ab2a3a381`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	4813 bytes
`javascript_obj111712_001.js` `95e7a107486e6323aae8e61854398b597092db0c491ced13e2e9e6fc3178004f`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD37	517 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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