PDF malware analysis — malicious · d14b60593c5f1299

MALICIOUS

PDF

2.8 KB

MD5: 99dd940f281a652bebde31404817be76 SHA-1: ca0d305f63a0643ae54a3f06f725b8b5764af483 SHA-256: d14b60593c5f1299e0c8e3701bbf3c968f1b62f63b76fa025520cfc9e008f17b

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file 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 obfuscation and dynamic code execution. The extracted JavaScript files, `javascript_obj111611_000.js` and `javascript_obj111612_001.js`, are likely responsible for downloading and executing a secondary payload. The obfuscation indicators and the nature of the JavaScript actions point towards a downloader or dropper functionality.

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_obj111611_000.js` `32ef8f8ae6a395879b24c3351ddab04082df54991097c34d2055c3135e698daa`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	256 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `dbfc61d8e1cbb9167306c3f61d9782ce109f6d968362be0fb25cfcd8d3c6c9ca`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x266	3362 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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