PDF malware analysis — malicious · 28450bf8eee33eca

MALICIOUS

PDF

1.95 MB Created: 2011-72-51 03:25:00

MD5: ba8587232d9b7368a60f297877d118d4 SHA-1: dd2b58408dfb41e438a697de85d5073fc6ba4e31 SHA-256: 28450bf8eee33ecaeafd28f5eb578265e239428a2ab68aa592355a4a96598346

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. The presence of a high-severity PDF_EVAL heuristic indicates the use of eval() to execute obfuscated code, a common technique for delivering malicious payloads. The ML classifier strongly supports the malicious nature of this PDF. No document body text was available for analysis, but the script's obfuscation and eval() usage suggest it is designed to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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` `93831bad707820dd5257c092013e09da3843969fd9b76c968517710be7733506`	pdf-javascript-stream	PDF /JS object 1 at offset 0x6182	523 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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