PDF malware analysis — malicious · 8915f35fea36e907

MALICIOUS

PDF

92.8 KB

MD5: cec00e92e1e19c0bf65d15f293519c82 SHA-1: 216948527a0bebe1fabee03d70f24ae955f7f86f SHA-256: 8915f35fea36e90781fdd63ddf69cb7cd312708d44b6f591c06a6e9e90859506

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The PDF document contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. Specifically, the CVE_2009_4324 heuristic identifies the use of the media.newPlayer API via annotation aliases, a known vulnerability for PDF exploitation. The deobfuscated JavaScript, legacy_pdfkit_stage_000.js, appears to be constructing a URL and executing it, suggesting a downloader functionality. The presence of obfuscation indicators further supports malicious intent.

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` `b21e5d3c330ec158d6b52394c927affd7b947eac22194ff64d5ebf9104f3d695`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2578 bytes
`legacy_pdfkit_stage_000.js` `ada8be7fcbbba2749cefe5122fc7e86dce72eb1b6eeddf6c5a324ca92ef02182`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xC2D	2546 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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