PDF malware analysis — malicious · 93fb352f4d252bae

MALICIOUS

PDF

5.6 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe (via Notepad)

MD5: 100c447c16f329f3821ce4732798043f SHA-1: 14a2492bcece96bd254ae8cb944be02770e26f50 SHA-256: 93fb352f4d252bae618ba706893a8d241c29a76fe06135f0b5e945a19ed3c55d

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a high-confidence PDF_EVAL rule firing suggests that the JavaScript is being used to execute arbitrary code, likely to download and run a second-stage payload. The ML classifier also strongly flags this PDF as malicious. No specific family could be identified, but the techniques used are common for PDF-based malware delivery.

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_obj0006_000.js` `f300bc08343cd9e30d9ece0559ebfacd3efa2c283a270d020a2cc6e55bdf8b42`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1381	151 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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