PDF malware analysis — malicious · db4c7c3ae326e6ba

MALICIOUS

PDF

16.8 KB

MD5: d9d0f4f7bfe9f2dc46d5c48af53bf3cb SHA-1: 80f6a6ed5afc5e6396e18b1d35ce0579bcf52d24 SHA-256: db4c7c3ae326e6bad1311b050af67ad276bb6105da91054063bb3db1189e996e

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample 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 specifically points to the media.newPlayer exploit, which is triggered by the JavaScript. The deobfuscated JavaScript stages suggest the primary intent is to download and execute a secondary payload. No specific family could be identified due to the generic nature of the exploit.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `275f750c722c98059f9b3167f578f3d5961d34a0e758ce4fc52bea4a078e5bc0`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3076 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_obj111712_001.js` `ebae720f0b5321793fa0703c9c3161fab05dac906623faa56b18e3cdfe3abd5a`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xDC8	11122 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` `200a5719bd9d9edee0791dd6b700ace89614c701a0ddd0b11e0cad033772472d`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3970	2431 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` `14d9d23d619682a659b666d1537fbe47a8cc4db49b0c37d63714847d39b24a42`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xDC8	1080 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` `5091795dc7dfd1e269d30a5ab394f1536cab6157b0cb74b7e26a9fdc9129a46f`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3970	165 bytes
`legacy_pdfkit_stage_002.js` `376cfd6a3f51ed54b8d4ce85d16c3e84d41b9f4c131e27b4ab8715d3f12255e2`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xDC8	1246 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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