PDF malware analysis — malicious · 4d0f65ebfa76793e

MALICIOUS

PDF

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

MD5: 9a9064b005e45a931132fac1b1a8f883 SHA-1: cbce81ebd149b87948302202e8e8c2766dc7e94e SHA-256: 4d0f65ebfa76793e42d4570537f895f0d94c3c2b53f59cb12c314b78277032ab

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 presence of an eval() call and String.fromCharCode usage within the decoded stream suggests obfuscated JavaScript is being executed. This script, identified as javascript_obj0013_001.js, is likely responsible for downloading and executing a second-stage payload, contributing to the malicious verdict. The confidence is moderate due to the obfuscation and lack of specific family indicators.

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` `19968b34a4444c5afa96bc902c8e1f4de70180367626366a2525924d19bb6a28`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12537 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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