PDF malware analysis — malicious · 2130a82d47ed5107

MALICIOUS

PDF

16.5 KB Created: 2007-12-35 21:45:26 Authoring application: Adobe

MD5: a10267a20c20fd291ca97729cfcd6765 SHA-1: 4c8cc4f0ccb1be13fdb6de2e02e4e5883bae5eb1 SHA-256: 2130a82d47ed51073c7b38a075b3012af7ca378972859d139365c1239cda8abe

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript streams, with one stream exhibiting an eval() call, indicating code execution. The ML classifier strongly flagged this PDF as malicious. The presence of obfuscated JavaScript suggests the intent is to download and execute a secondary payload. While specific IOCs like URLs or hashes are not directly extracted, the embedded JavaScript files themselves are treated as IOCs due to their suspicious nature and obfuscation.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `114922f79b1563ea5458b86f22a6fd02373c98b9bbf2342010bae74cb998e470`	pdf-javascript-stream	PDF /JS object 32 at offset 0x42E	1666537 bytes
`javascript_obj0034_001.js` `d72c9fb29c217a430981a605abd8d054df1ffd27591a769ba52c85a4a0223f9e`	pdf-javascript-stream	PDF /JS object 34 at offset 0x3EF2	1028 bytes
`javascript_obj0036_002.js` `26eb0b0696a56f8a17c2140d898067edf9d0afda49bc9f7ba1d5047d30ded466`	pdf-javascript-stream	PDF /JS object 36 at offset 0x80	1354 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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