PDF malware analysis — malicious · bc16a00b721c97f2

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: 7ca58d5ac292d998a3a2420c00ba6d41 SHA-1: 0526b9de8041a8fd0d1291fb68c15c8c5f2196ad SHA-256: bc16a00b721c97f2ff2c8ea7915c8b1b1ac688e076dca51c9f1d8b1a2bd85a5d

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 PDF_EVAL heuristic firing suggests that the JavaScript is obfuscated and likely uses eval() to execute malicious code. The presence of 'javascript_obj0013_001.js' as an extracted artifact further supports this. The script's purpose is inferred to be downloading and executing a second-stage payload, which is a common technique for malware delivery. Confidence is moderate due to the obfuscation making precise analysis difficult.

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` `de6b814d2f6bc831296965648b34b7f031b7d31666cd0b9d5c203ec1f09c98a9`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12485 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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