PDF malware analysis — malicious · 59cc61dab3663af3

MALICIOUS

PDF

2.8 KB

MD5: ad6895c101120da0d8ad783220370491 SHA-1: cdf9f98fd0f54f262ba78fd7c5a70e1afb5a027a SHA-256: 59cc61dab3663af34b339b48e46bde7f579281179bfd09596303f4c6a67881bd

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. The 'PDF_EVAL' and 'PDF_FROMCHARCODE' heuristics suggest that the JavaScript is obfuscated and likely attempts to download and execute a second-stage payload. The presence of two extracted JavaScript files further supports this. Due to the obfuscation, the exact payload and delivery mechanism cannot be definitively determined.

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` `3633146328adaecf6f464dfb31cab65506f40701baf14c13178633988ff70d97`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	258 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `10175f77e8cd43143e4154e880e57ec0d14d6dece4c960570531d36080e59b65`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x269	3374 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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