PDF malware analysis — malicious · 89ea23e7a7ef04cf

MALICIOUS

PDF

4.3 KB

MD5: 8a1ead72629a53b6dbb26c147f473c19 SHA-1: 51efd9b6615e5bdccf6725a2a0af2909abc7599f SHA-256: 89ea23e7a7ef04cf5aa20fc20b00b1ebaa5572553effee533351b4d2d3dab44e

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 presence of PDF_EVAL and PDF_FROMCHARCODE rules suggests the script is obfuscated and uses eval() and String.fromCharCode to execute arbitrary code. This pattern is commonly used to download and execute further stages of malware. No specific family could be identified due to the generic nature of the obfuscation and lack of further indicators.

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_obj964285_000.js` `21871c915cad1ffd1a07629f0f967f9bf087111ffc6d21b5785550c36fb60fad`	pdf-javascript-stream	PDF /JS object 964285 at offset 0x134	8327 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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