PDF malware analysis — malicious · 1ac0d86ce4d71e3c

MALICIOUS

PDF

4.6 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: af7a5ea9bbe13cac980bde749b294a81 SHA-1: 3f7b85739ac4008f4a68ac31747aceab965db8b0 SHA-256: 1ac0d86ce4d71e3cff536aec78db455a18e56156984bc08a8ef86d061027cf2d

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. The ML classifier also flagged it as malicious with a high probability. The JavaScript stream, identified as 'javascript_obj0013_001.js', likely contains obfuscated code that uses an eval() call to execute arbitrary commands. This points to a common pattern of using JavaScript in PDFs to download and execute further stages of malware.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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_obj0013_001.js` `608a194be05663c7fb057b101809c10cdc0a9d7108de27cb47056ebb127cb928`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6325 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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