PDF malware analysis — malicious · 8ecd6efa445b37e3

MALICIOUS

PDF

1.9 KB

MD5: 8ce04a858019b0aa5989277fa7fe80e1 SHA-1: 7c0cc5fafcad3571418818c5b014f8e8f83c8294 SHA-256: 8ecd6efa445b37e3c277e8cd5a3667891e5dc6c682aeb357c585b96a62231021

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream itself is obfuscated and uses eval() and String.fromCharCode(), suggesting it's designed to hide its malicious intent. The primary goal appears to be downloading and executing a second-stage payload, as evidenced by the obfuscated script and the suspicious extracted artifact name 'javascript_obj0009_000.js'. Due to the obfuscation, the exact payload and delivery mechanism cannot be definitively determined, leading to a lower confidence score.

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_obj0009_000.js` `11e18a469bb5203ba3685da0fd479abe86ffa160b08222bf74dd2300c104791b`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	7130 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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