PDF malware analysis — malicious · 8cde5285f482e306

MALICIOUS

PDF

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

MD5: 99f4770cbbc39f41cadf3b4b1e2b0ddf SHA-1: 6da4b156cf6b4c696974a68a1bbbdd2a193ab006 SHA-256: 8cde5285f482e3068f797b52e8a4b1f878afe17e4d7f7e284bd750438092d832

66 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 presence of an eval() call and String.fromCharCode suggests the script is obfuscated and likely executes arbitrary code. The embedded JavaScript stream, named javascript_obj0013_001.js, is the primary artifact of malicious activity. While the exact payload is not discernible due to obfuscation, the techniques used point towards a malicious script execution attempt.

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` `6004432695c98e872ebf524bbd70dde7f86938c3cd491440eb50b55e8503eef6`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	11016 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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