PDF malware analysis — malicious · fc6da6946513c272

MALICIOUS

PDF

5.1 KB

MD5: a51176a403263411ce0dcbae289b489d SHA-1: 7cb864dff4930daf88348fc560bd4c018affbdc3 SHA-256: fc6da6946513c27278c05fed937fb792481378a10f49ddad91fe3480edbebe45

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 and PDF_FROMCHARCODE firings suggest that the JavaScript is obfuscated and uses eval() to execute arbitrary code. This is a common technique for downloading and executing further malicious payloads. The extracted artifact 'javascript_obj79342_000.js' is also flagged for script obfuscation. Due to the obfuscation, the exact nature of the payload cannot be determined, but the overall pattern suggests a downloader.

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_obj79342_000.js` `ef87b4d4ad62df260a2f136cfe3ceccac80e801d7e0a6f12ff0fed06567700f8`	pdf-javascript-stream	PDF /JS object 79342 at offset 0x138	8360 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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