PDF malware analysis — malicious · b9006e3131098501

MALICIOUS

PDF

3.5 KB Created: 2009-03-28 13:59:29 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 3f1d9780956adfb8c3e6ca5cc4b5a129 SHA-1: fede433087fd87d4908d349586c646f623082b77 SHA-256: b9006e31310985012b364b7ebf8df4381b1df6b41e48c3a6114290b383ca23a9

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF document contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an eval() call and String.fromCharCode suggests the script is obfuscated and dynamically executes code. The extracted artifacts 'javascript_obj0013_000.js' and 'deobfuscated.js' further support this. The likely intent is to download and execute a second-stage payload, although the specific URL or payload could not be determined from the provided evidence.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `ad9ab8aae9ba3cce08c2c8b173b2d789a3de43280839e7b6919ae470eb2de937`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	7141 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).
`deobfuscated.js` `b4978c5c1e0a1e5f3f0713cac87cf35a08381f49d829d4c19ac8347ab7fb5c70`	deobfuscated-js	PDF JavaScript deobfuscation pass	15911 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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