PDF malware analysis — malicious · cc1b7bb38c88a3be

MALICIOUS

PDF

5.3 KB

MD5: 9f7eccea35f23ebd1799b6bdbbc2a031 SHA-1: 2271af03efc715585acd652db639bcac7092be77 SHA-256: cc1b7bb38c88a3bed2dc117f4bcd0b2f65daabb12b7854b4d540fdb06464797a

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The ML classifier strongly indicates maliciousness, and a high-confidence PDF_EVAL heuristic firing suggests the execution of obfuscated code. The embedded JavaScript file, 'javascript_obj0009_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_obj0009_000.js` `6e6e5577c306c2e2305cc1ec716d33893aee8eeb4516926aab8b61d0498952b2`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	55210 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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