PDF malware analysis — malicious · c1756b48dd32de14

MALICIOUS

PDF

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

MD5: 1e0b9d0f1614a6089d6bd55a60c8dfab SHA-1: 35946e4e446a2ba663669db04af0f37c77b619b8 SHA-256: c1756b48dd32de144266da1e8a3a266b7a86c5bd8b1718c2a0b187cd5c36a07d

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript streams, with high-confidence heuristics indicating the use of eval() for obfuscated code execution. The ML classifier strongly suggests malicious intent. The embedded JavaScript is heavily obfuscated, but the presence of eval() and the ML score indicate it is designed to download and execute a secondary payload. The document body contains what appears to be obfuscated JavaScript code, including string concatenations that reconstruct parts of JavaScript functions.

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_obj0013_000.js` `e2c09ce71267d03f02aad22e5553be78619b6bd2c2454c09e9b7e5b2f5e629d5`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	9555 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0013_001.js` `27ace4565c100d25482a54f293a3e33fcd8011041670ef3696d7125624ed0b08`	pdf-javascript-stream	PDF /JS object 13 at offset 0x358	10261 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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