PDF malware analysis — malicious · 276ef10115d35836

MALICIOUS

PDF

186.4 KB Authoring application: PyPDF2

MD5: 02763291fdc59fdbe06a9a0846330c18 SHA-1: 66ed2c72e1b4371b5243f42d77f8b92cabfc1cab SHA-256: 276ef10115d358361fc975940cb562f75928d607a92983bee2498de76cfc17c3

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file was flagged as malicious by an ML classifier and contains multiple JavaScript streams. One heuristic indicates the use of eval(), suggesting obfuscated code execution. The embedded JavaScript files are likely responsible for downloading and executing a second-stage payload, contributing to the overall malicious intent of the document.

Machine Learning

Nyx PDF Classifier malicious score 0.9965

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
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_obj0019_000.js` `e3ce5acaeed64f9b70d4c1e96050f5396617cbfe528dc41ea4c55234ea815a00`	pdf-javascript-stream	PDF /JS object 19 at offset 0x19E4	98015 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0019_001.js` `cae1f354af7d012e6cba1ca50241ed0b52816d91adb94c17bc23cf24b8d8b6da`	pdf-javascript-stream	PDF /JS object 19 at offset 0x19E4	96656 bytes

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