PDF malware analysis — malicious · affaeff90f2401a9

MALICIOUS

PDF

9.6 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: cdff3f70a0af4afd6d0f6becd7318079 SHA-1: e4bdcccfa641aafaf88fb8a506e235d738d2bc19 SHA-256: affaeff90f2401a978f25ef0dedfe0309180f2a382ff5a996889d5f6dbf1e902

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier strongly flags this PDF as malicious. The JavaScript appears to use `eval()` and `Math.fromCharCode` to deobfuscate and execute code, a common technique for downloading and running further malicious content. No specific family is identifiable from the available evidence.

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `8c3746de14a64f0f6f538c22dfa56524c680b9a1d9eca4adb1f872a14a8288ff`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	8226 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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