PDF malware analysis — malicious · 97f048a1fe273e5b

MALICIOUS

PDF

19.2 KB

MD5: a32fe3022a1a117c70348dbc0c6c43ea SHA-1: c2e2374617414df7fbec4d8794102c7fc54f9185 SHA-256: 97f048a1fe273e5b3838557d5770ba92b738a2650c20c3ddc2148027d953f04b

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains obfuscated JavaScript, including multiple eval() and unescape() calls, which is indicative of exploit code. The critical CVE_2009_4324 heuristic specifically mentions a 'media.newPlayer' trigger and a 'legacy_pdfkit_stage' indicating the use of a known exploit kit technique. The JavaScript is designed to decode and execute further stages, likely leading to the download of a malicious payload.

Heuristics 5

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `ada4812bd5382d5768e2ca6bb07572268821dcfc21d00fd50f70e4f53bcb3ed4`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3051 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111712_001.js` `32f4a28212c0c07b28d9cb8bfd6dabe027d56357a67ce19d0eb81c3c8b45de55`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xDAF	13871 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111713_002.js` `59cc343ee750dca7a7113c25ca501f56d48cd65594e37aa3ee8d8b6947ffe6db`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4414	2189 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `70d0a51c1c7722ff74adbe5f4634e78879703612c3add379c457322981fde41b`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xDAF	1090 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `cd7088aa0ba5ce42db7faac79c4063dccc339c8953139714658e9cb6b07c91fc`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4414	165 bytes
`legacy_pdfkit_stage_002.js` `3ff7cae0962a5957a2a829be7b2e1822651aee9f9d5ddd06efe70168e0303fc1`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xDAF	1256 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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