PDF malware analysis — malicious · 37963040ec795f9a

MALICIOUS

PDF

17.2 KB

MD5: 6652c7037449347507158a87db57e1fc SHA-1: 6496933f249afcc125579d12f5caaab42e3ea695 SHA-256: 37963040ec795f9ac7205c3741cbdba17195dfa81210fe47a48270dd4ceb1636

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains obfuscated JavaScript, including multiple calls to eval() and unescape(), which is a common technique for hiding malicious code. The critical heuristic firing for CVE_2009_4324 indicates a known exploit for PDF documents targeting the media.newPlayer API. The embedded JavaScript streams and deobfuscated JS files suggest the script's purpose is to download and execute a second-stage payload. The reconstructed string literals like 'eval', 'unescape', and 'String' are indicative of the obfuscation techniques used.

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` `f2e3516ab534d626a7fb7bbb5aeb38a3493e2b1135ed8a65041be56873186441`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3090 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` `d7558012eb5da6581d9da826a4c56f6b2937446482b0031a21112434a5c9a1e5`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xDD6	11430 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`javascript_obj111713_002.js` `4803541b62af4f11efeabb7fbab7e45174e59947e7a9528b8402b37f8990d259`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3AB2	2462 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `3cece914b914841a8b17f6d40f0553e78ef8ed60e76aa68605abeae7e560099e`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xDD6	1081 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` `2aeec6f3699b00965f569d73be4d2258b1dadeae9c3474afa6748f38b5930821`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3AB2	170 bytes
`legacy_pdfkit_stage_002.js` `c68ded7647687583be7d7bea58dd15329d93525cc1689cdd7873c2f225ff764f`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xDD6	1252 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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