PDF malware analysis — malicious · ba559ebc242c7cdf

MALICIOUS

PDF

3.9 KB

MD5: b85da36e6eb28172bc1b37ed40d3105e SHA-1: d4a737d6161db55af653ba8ba9392139d24f3dca SHA-256: ba559ebc242c7cdf721bd2b42f8a36617a11346a66fa7b96c7d78b987187adfc

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell

The PDF file contains embedded JavaScript streams, with one stream exhibiting eval() calls and String.fromCharCode usage, indicating obfuscated code execution. The presence of these JavaScript objects suggests the PDF is designed to download and execute a second-stage payload. The document body content is unreadable, providing no further context on the lure.

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` `6ce866767ec1e74fdce9d21bd3b0315c23769a3c4673c9de20753f445a21ded7`	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` `780d993b87219f584183cabd549e07589cb069fbdd0d1c898065afffb5a4b41e`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x268	5597 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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