PDF malware analysis — malicious · c0818be0aac66231

MALICIOUS

PDF

79.1 KB

MD5: 8f51997e866dfad01aeacca97bd2e3ca SHA-1: 9471068a0a75a2e65d616effe48ca04b28e10bcc SHA-256: c0818be0aac66231d3309427e6785ce2d3f3878083cdbee07f0fbcd413d734e8

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.001 PowerShell

The sample is a PDF file that contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2009_4324 heuristic specifically points to the exploitation of a vulnerability related to media.newPlayer, which is used to launch embedded content. The deobfuscated JavaScript, legacy_pdfkit_stage_000.js, likely contains code to download and execute a second-stage payload, although its exact functionality is obscured. The presence of obfuscation indicators further supports this assessment.

Heuristics 4

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)
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `68c45ca0009875723ec4dbdb941448b34ef04b359dea00aebd9febb5513d15b1`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	3583 bytes
`legacy_pdfkit_stage_000.js` `dbb326f9ab28c24e745edc41cf3827e86e38227fd6b1b28860c777c5d18f5ae1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x101A	2552 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` `42025b552c7960b53abcd8cd732b01c8d109eccfdfefc352b9826c4d5807d414`	deobfuscated-js	cross-stage annotation API aliases at offset 0x1E7	81 bytes

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