PDF malware analysis — malicious · d5da20f7faa417c6

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: d14a4811510e88e6f9ba42a383c7879a SHA-1: 3c1b9fe68cf28cb790bfbdac25f20724f9a375f6 SHA-256: d5da20f7faa417c6ee7e9d0b8cdb5be7714fa037f88964d44ecb11e6d9eaeeac

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 PDF_EVAL heuristic specifically points to an eval() call within the JavaScript, which is a common technique for obfuscating malicious code. The presence of String.fromCharCode further suggests code obfuscation. The extracted artifact 'javascript_obj0013_001.js' is also flagged as suspicious due to script obfuscation indicators. The script's purpose is likely to download and execute a second-stage payload, though the exact mechanism is obscured.

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` `3a7982bbd37fd08184299fed4bd13292c24741f6e4f2473bbdc7d5be046066d6`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	8872 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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