PDF malware analysis — malicious · c253f067864bcc0b

MALICIOUS

PDF

5.1 KB

MD5: cc5264b4cad074be17a98f85f76f2ce2 SHA-1: 868a2db65745c33505d5372919ec5da566274da9 SHA-256: c253f067864bcc0b2eeff8c403d7eef0bbd0ae1f01213d9b41e934198edd4722

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The eval() call and String.fromCharCode usage suggest obfuscated code execution. The embedded JavaScript file, 'javascript_obj1623_000.js', is the primary artifact. This script is likely responsible for downloading and executing a secondary payload, which is a common technique for initial access and further system compromise.

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_obj1623_000.js` `3fb76628fbd2798493fa5a64373ebde6972bfd4774e46706915038285644a09a`	pdf-javascript-stream	PDF /JS object 1623 at offset 0x133	8352 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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