PDF malware analysis — malicious · f7c4a2872b9112d0

MALICIOUS

PDF

21.4 KB

MD5: 6c93c2e0d788b6de4b06f33928f7154c SHA-1: cd6f1ef58ab2068ef12d6ae6c538682ab60580f3 SHA-256: f7c4a2872b9112d055ea7565d3a1fa9fa6a4fbb2b52b9ab6413290993c025159

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings and the presence of deobfuscated JS streams. The critical CVE-2009-4324 heuristic specifically points to the use of the media.newPlayer API via an annotation launcher, a known method for executing arbitrary code. The deobfuscated JavaScript likely serves to download and execute a secondary payload, although the exact URL or execution method could not be fully reconstructed due to obfuscation.

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` `f6ea32f52657af3dabba4b9fda1e2a2ef44eb6b4c236df391abfde55fdfbc795`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2205 bytes
`legacy_pdfkit_stage_000.js` `630bbd87d4c991442612bbfc5d0e64a58d98100212c3f8e897f80b45684ffd16`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xAB8	1262 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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