PDF malware analysis — malicious · cec10d649f7eaead

MALICIOUS

PDF

25.9 KB Created: 2011-72-51 03:25:00

MD5: b1bb746c522dc99e7da73fe8bf6b0bc1 SHA-1: 05e7a8d4dfe50c11d258663daf0cb3708e7bf99f SHA-256: cec10d649f7eaead0fd8814321efbb53dcebee3982c59eec9297c4d94e1f59b5

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A high-severity heuristic, PDF_EVAL, indicates the use of eval() for executing obfuscated code. The ML classifier strongly supports maliciousness. The embedded JavaScript file, javascript_obj0001_000.js, is likely responsible for the malicious behavior, potentially downloading and executing a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `0e773c28a1f8653e34fcd49458e31931f89e7a85b25e8b308f669ecb2eedd561`	pdf-javascript-stream	PDF /JS object 1 at offset 0x6345	866 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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