PDF malware analysis — malicious · ef6677902d5d46df

MALICIOUS

PDF

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

MD5: b5c8111767bd7b219d1684ccdedbf7f3 SHA-1: 1a05071611ea98df883f2f93fb5c161264d66a94 SHA-256: ef6677902d5d46df1315384124e1ae469c34ac390318d116edcb25202ae8e45a

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, with one stream being particularly large and obfuscated. Heuristics indicate the presence of JavaScript actions and an eval() call, suggesting the script is designed to execute arbitrary code. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript is likely responsible for 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
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` `937af3560c2c0d2815feaf3b13440c7e565eb422fb67a66128683f096e13c395`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1EE	26352 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `e6be08d10af4a69cf9563674c9e0dfcb8783c077d14ecf3f6c000bb8e50c34fd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1EE	506 bytes

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