PDF malware analysis — malicious · 8fa8593958782db9

MALICIOUS

PDF

4.3 KB

MD5: bd89bf52ae1d409196f5d93244b6abc9 SHA-1: 05c722a05ebdb094cd76ad472065654500572084 SHA-256: 8fa8593958782db9f6d827bd25677b34691853e425a71d961dd04df9ef226a8b

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 is obfuscated and uses eval() and String.fromCharCode(), suggesting malicious intent. The primary function appears to be downloading and executing a second-stage payload, as evidenced by the 'Suspicious extracted artifact' heuristic. No specific malware family could be identified.

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_obj8745_000.js` `2be8d0602c9af33613c2e90992378edff58aa323cef3bceb7c9dce550cfb9b8c`	pdf-javascript-stream	PDF /JS object 8745 at offset 0x137	8308 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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