PDF malware analysis — malicious · 96e5d6149f4db9e9

MALICIOUS

PDF

5.1 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 7815db61b4b0036eca58a270e730d3e4 SHA-1: 3d8d8670ee49c7e1ed70b33d992da98e3d916157 SHA-256: 96e5d6149f4db9e9d276e623abe299946e0c5af22261b7464a9299eddd1e3c35

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 'acroform_b64_00.js' and 'javascript_obj0013_001.js' artifacts suggest the presence of obfuscated scripts. The PDF_EVAL heuristic firing points to the use of eval(), a common technique for executing dynamic code. The overall structure and heuristics indicate the script's purpose is to download and execute a second-stage payload.

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_001.js` `f1dc828d51130728c8476c2151f85a30f485b9068ab0e38231ef88af79d24adf`	pdf-javascript-stream	PDF /JS object 13 at offset 0x364	6561 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `fc5f8a7983d0faaf68866146c66c885e5777e38ec12fdbd47e1df5a2d7de6654`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x700	4265 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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