PDF malware analysis — malicious · 4d029a744c68f407

MALICIOUS

PDF

8.4 KB

MD5: 800098a1f90e51939392719a88c80e48 SHA-1: 30dae9dac12b121cc9d6002082101bf6ce7a555f SHA-256: 4d029a744c68f4072d66f6c4e2bc6cf0bbccb24cdd4e53df895ac90bb8a10391

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 utilizes eval() and String.fromCharCode(), suggesting obfuscation and dynamic code execution. The primary function of the embedded script appears to be downloading and executing a secondary payload, as evidenced by the suspicious extracted artifact 'javascript_obj0013_001.js'. The exact download URL or execution details could not be fully reconstructed due to obfuscation.

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_obj0013_001.js` `24529102a291af0a822eaf893d3981d16ab709a78a1027bef2d2cdca8f8bea8e`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	14752 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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