PDF malware analysis — malicious · d3bb88eeb3e1d197

MALICIOUS

PDF

25.8 KB Created: 2006-02-01 14:14:12 Authoring application: Wegoptyr (via HghTc6Fs)

MD5: c509bf183e84987358ccad6a26298d0a SHA-1: 40124893c2ca0da1a6be73ffc1982c095ddcacd4 SHA-256: d3bb88eeb3e1d1974d067b78f0d942c282e0686d22b13bf7f3cc16486a5e8393

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, with multiple heuristics indicating its malicious nature, including the use of eval(). The ML classifier strongly flags this PDF as malicious. The embedded JavaScript streams, named javascript_obj0007_000.js and javascript_obj0007_001.js, are the primary indicators of malicious activity. The script's likely intent is to download and execute a second-stage payload, although the exact mechanism is obfuscated.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `7e8b5b62ca9dcb815b33757533a1313362c026ceb2a2205b0cf67b6fe4d5ccd3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1EE	25274 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `01aac321142475ea62681471bacfb093b7e491184d70542bc63feb42fc5c0a1e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1EE	25034 bytes

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