PDF malware analysis — malicious · 297eb2e1a361cd7e

MALICIOUS

PDF

1.9 KB

MD5: 076ddaeccf086822d98f54b3bb7cfe20 SHA-1: 51817d77158d755327a79e7a2d88e14dadcab18c SHA-256: 297eb2e1a361cd7e0ae4610906748ad0d3b6889ab41bfa674367e7aeecd10c8f

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The presence of PDF_EVAL and PDF_FROMCHARCODE indicates the execution of obfuscated JavaScript code, likely to download and execute a second-stage payload. The ML classifier strongly supports the malicious nature of this PDF. While the exact payload is not clear from static analysis, the techniques used point to a downloader or dropper functionality.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `9b9a8ef356dcd3a94b0752beb7828a0c522cf1fc0303539c9ed9d0707d25330f`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	7353 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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