PDF malware analysis — malicious · 2ebde43d54a30957

MALICIOUS

PDF

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

MD5: 4f54e5c5b2eb5effe576ca9d5c4e930b SHA-1: 3d56136f07531ba643fca4fcaa9e9f86312287ef SHA-256: 2ebde43d54a30957bac72ce88f0f4c7879810c26ca872adc44bf4efe1c37ccc9

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' firing specifically points to an 'eval()' call within the decoded JavaScript stream, which is a common technique for obfuscating malicious code. The 'EXTRACTED_FILE_STATIC_TRIAGE' heuristic also flags a 'Long encoded blob' and 'Script obfuscation indicators' within the extracted file 'javascript_obj0013_001.js'. This suggests the script is designed to download and execute a second-stage payload. The confidence is moderate due to the obfuscation making precise analysis of the script's ultimate goal difficult without dynamic analysis.

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` `8113c50079ce7166990585b180557d4314b52fc75aa9d2ebf0768b9a2f46272b`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	23856 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).

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