PDF malware analysis — malicious · 4d8050659b03e1a9

MALICIOUS

PDF

70.5 KB

MD5: 221216a96b66aac57514d6e0dac0930e SHA-1: 9ae45067513a6495fb92284eac1e3aeeb97c893e SHA-256: 4d8050659b03e1a9b85292dd78bbdf1bc670176a5649b0a6de3f4c586446413a

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and PDF_FROMCHARCODE suggests the JavaScript is obfuscated and likely intended to execute arbitrary code. The extracted artifact 'javascript_obj0006_000.js' further supports this. The obfuscated nature of the script prevents a definitive analysis of its exact payload or persistence mechanisms, leading to an 'unknown family' classification and a moderate confidence score.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `a287466bca58cf94ffadb0cfbd13b9f86f0350d89e343efa14cb45d905af61ff`	pdf-javascript-stream	PDF /JS object 6 at offset 0x12D	71667 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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