PDF malware analysis — malicious · 84d9f718c8204377

MALICIOUS

PDF

5.1 KB

MD5: 4390c3a30b76d793c38e77602f6341b0 SHA-1: b1b7a51c68c468f8fc721bdee09ff940b7eb2c80 SHA-256: 84d9f718c8204377d48daffe95a6985030b42b3109f56a9fc844014c94c6cb84

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 PDF_EVAL and PDF_FROMCHARCODE firings, along with the 'Script obfuscation indicators' from static triage, suggest the JavaScript is intentionally obfuscated. This obfuscated script, named 'javascript_obj67453_000.js', is likely responsible for downloading and executing a secondary payload. The lack of readable document body text prevents a more specific determination of the lure, but the technical indicators point to a malicious script execution.

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_obj67453_000.js` `3e07e352b9b6dc594b5d0bcbc921903bf269c1b48aa8e63a6dc1e2f64efcb0fc`	pdf-javascript-stream	PDF /JS object 67453 at offset 0x136	8358 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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