PDF / .BIN malware analysis — malicious · 4da94df38025f18b

MALICIOUS

PDF / .BIN

3.8 KB

MD5: 65cc9cbe8f4d26f9b84959df34f876b4 SHA-1: 1212ec3cb540e16092992db18d9fa1dc4d34b777 SHA-256: 4da94df38025f18ba38d730d5fcb8a07cd2746cb2aece398bb2c1ee532acc7b8

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL heuristic firing suggests that the JavaScript is using eval() to execute code, and PDF_FROMCHARCODE indicates string manipulation commonly used for obfuscation. The extracted JavaScript files, particularly javascript_obj111612_001.js, are likely responsible for downloading and executing a second-stage payload. The obfuscation suggests a deliberate attempt to hide malicious activity.

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` `e56f14c0a1918debe30aff90939162683b7ca47b57c3d21d33a6aa46c6373797`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	257 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `540da58dafdecd2eda7082cc04206be9f94ed9ea52c8a7d875976654d727b211`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x267	5542 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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