PDF malware analysis — malicious · d2e961b73568d264

MALICIOUS

PDF

4.3 KB

MD5: 4a1dcd423037e1c56d291f9800b4a3e4 SHA-1: a407d14a083c1cb975411fc0314dc1b386656ef3 SHA-256: d2e961b73568d264204ec84155c31b7df220f916fa24cf9f1dfc33bb22eab0ba

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 script is obfuscated and utilizes eval() and String.fromCharCode(), suggesting malicious intent to execute arbitrary code. The primary function appears to be downloading and executing a second-stage payload, as evidenced by the extracted javascript_obj1906_000.js file. The obfuscation and use of eval() are common techniques for evading detection.

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_obj1906_000.js` `0903c2af75a0f6a685087bf67201f3ce251c08f391c7dc6f0fa49823060259eb`	pdf-javascript-stream	PDF /JS object 1906 at offset 0x135	8299 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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