PDF malware analysis — malicious · c941d398a3867697

MALICIOUS

PDF

17.2 KB

MD5: 63596c4a8f5c19fdec52d70f105c0e36 SHA-1: 64b7df9f0af023985378d5a378042c5202e801c6 SHA-256: c941d398a3867697812c6041f05850ae7cf1b3a5e1c113c775dac1e8ebb75f81

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript, including multiple calls to eval() and unescape(), indicating an attempt to hide malicious code. The critical heuristic firing for CVE-2009-4324 confirms the exploitation of a known vulnerability in Adobe Reader. The deobfuscated JavaScript streams suggest the primary purpose is to download and execute a secondary payload. No specific family could be identified due to the generic nature of the exploit and obfuscation.

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` `08fa2999d6a75e47118dcc9cc6e4cd18e0f1f323d7ad1a1ac9f7fc488c0b56de`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3331 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` `5b49fb8efd7df951bd8f9d5d122596df75c065fe1b103915d957590df578e0e5`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xEC7	11465 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` `055726d8001bcc7ca97c518e0c52190a3ce584fc859d34ea3a365f698171bc51`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3BC6	2190 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` `896e5c7c27020e5da1cddd26f0a5229db3ebb556bf94d58db3b5a4346e86977d`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xEC7	1083 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` `68933554f5050da91d89dd2078df4546bf40c19412086d02bd071d0634dc5c16`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3BC6	169 bytes
`legacy_pdfkit_stage_002.js` `a8c04ddc1ad7a0b95b0dde79eb1814d4fb3dad77d3cf236732e78b0d676d3802`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xEC7	1253 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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