PDF malware analysis — malicious · c90bb691b5f4c86f

MALICIOUS

PDF

6.0 KB Created: 2008-12-03 13:57:41 UTC

MD5: 4537fbe99b3e0ab405c0f4a4fd1e0101 SHA-1: 6f30c861204cb404cc8e5b2637ba84bd6224f9d4 SHA-256: c90bb691b5f4c86f2254d50d37a0d3341414b720f9a265ee7faf7b652efffac0

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream exhibits obfuscation and utilizes eval() and String.fromCharCode, suggesting an attempt to execute arbitrary code. The extracted artifact 'javascript_obj0006_000.js' further supports the presence of script-based malicious activity. The primary intent appears to be code execution, likely to download and run a secondary 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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `8fcdbc5e20162eb5cb0c562e4c7603e3102b40e3d3cec31659226101c4f959ee`	pdf-javascript-stream	PDF /JS object 6 at offset 0xB4	9729 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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