PDF malware analysis — malicious · b70b707e205e22f7

MALICIOUS

PDF

4.9 KB Created: ego taw Authoring application: ego taw

MD5: f509f0a6a0c971395bc86580ca6c23ec SHA-1: 537fa7fee6cc8517491bde6836aeb1718d66e32c SHA-256: b70b707e205e22f72af1a7d72c8aaf2325ee6235c5446327ad3eb0b8c7afbc6a

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier also flagged this PDF as malicious with high confidence. The embedded JavaScript file, 'javascript_obj0006_000.js', is likely responsible for downloading and executing a second-stage payload. Due to the obfuscation and lack of specific indicators, the family is unknown.

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_obj0006_000.js` `4786f7a16a575b8ac10db6b3ed6a07d164bf2ead4aba6929491d5d09a61cf389`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A4	20790 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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