PDF malware analysis — malicious · a8947491fa3cf9b6

MALICIOUS

PDF

5.1 KB

MD5: 7ba884c264fbae70f52cd695bee0f5ee SHA-1: 08932b292f1052d2ad3d7b11591d764316e04bc7 SHA-256: a8947491fa3cf9b6e31ae24d1d71bf8b75a1b2ef31611e5378b76fa0a8e7162b

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF document 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 likely uses eval() to execute arbitrary code. The presence of an extracted JavaScript file further supports this. The primary function of the script appears to be downloading and executing a second-stage payload, although the exact URL or execution method could not be fully determined due to obfuscation.

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_obj1864_000.js` `783f2a61e9b99726bf7b16505ecd32aaa0006fbbbadc28b18c4a6d546c1015e1`	pdf-javascript-stream	PDF /JS object 1864 at offset 0x134	8349 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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