PDF malware analysis — malicious · c4ce4d85d96dac25

MALICIOUS

PDF

4.0 KB

MD5: 05b0f5b977f26fe63208ae494cdf2fa2 SHA-1: 5093679dfb0363d64a4e053833a2c785ecb2d5c2 SHA-256: c4ce4d85d96dac2583260871865f53723f4bf645601ec503e8301ac79ca90ca5

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and PDF_FROMCHARCODE rules suggests that the JavaScript is obfuscated and uses eval() and String.fromCharCode() to execute code. 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 and use of eval() are common techniques for evading static analysis and delivering malicious content.

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` `523fc3cb3294dc9271d2c825d0b61638a600e39f35826688a507ddad097c5136`	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` `ba6e70956b0f52dbfb06f05fb342346e123fa4f57632b9f5e4dcb6d3644649a8`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x268	5538 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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