PDF malware analysis — malicious · 397eb69ad97aba0f

MALICIOUS

PDF

3.5 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 04310682b16b60e06ff613d6ffa4f93b SHA-1: b68410e8eb391b91c30424b44725ebae18d53004 SHA-256: 397eb69ad97aba0fffb2bdda4c5f04f89f5730f507443e3dc8f6a8c49dc5b2c4

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream exhibits obfuscation, including the use of eval() and String.fromCharCode(), which are common techniques for hiding malicious code. The heuristic EXTRACTED_FILE_STATIC_TRIAGE specifically flags 'javascript_obj0013_001.js' as a suspicious extracted artifact with script obfuscation indicators. While the exact payload is not discernible due to obfuscation, the presence of these elements strongly suggests the script is designed to download and execute a second-stage payload.

Heuristics 5

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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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` `44a5b15d752c96e1c7a490abd7ce5009ae9e168a38ed3cc22c9ddc4cbdb39da8`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	8823 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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