PDF malware analysis — malicious · f94ad8f8466fcce2

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: 38f22c345edb0f8ac434b3939c2dbe18 SHA-1: 0e2ee94631f378657c825a91d8e08fd8ed726c3a SHA-256: f94ad8f8466fcce276cefcb5f7dcf9acb527ebe27a3ac05f1e55f55122e458f8

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing and String.fromCharCode usage within the decoded stream suggests the JavaScript is obfuscated and likely attempts to execute arbitrary code. This is further supported by the 'Suspicious extracted artifact' triage signal pointing to 'javascript_obj0013_001.js' with 'Script obfuscation indicators'. The primary intent appears to be the execution of a second-stage payload, though the exact mechanism is obscured by the obfuscation.

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` `2a1974fcb8695b1f2a8150f816849966f4e7379880b895a2344a2a9cf57d6308`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	8826 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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