PDF malware analysis — malicious · c320f6647a05431f

MALICIOUS

PDF

15.3 KB

MD5: 6ceea5a6cb0d1b6b6ca3cb990a1c4853 SHA-1: 234fab78f8d9aea9223e77a50b51e255ba7f7412 SHA-256: c320f6647a05431fd47126efce750c7644e6098088a5c6fd4c52867cd4350f08

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains obfuscated JavaScript, including multiple calls to eval(), unescape(), and String(). The critical heuristic firing for CVE-2009-4324 indicates the use of the media.newPlayer JavaScript API to trigger the exploit. The deobfuscated JavaScript stages suggest a downloader pattern, likely intended to fetch and execute a second-stage payload from a remote source.

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` `e3bddf11d2bb0c2bf1abc3ddbcc33e14d8b1d06fcb34d6313402058701546308`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2775 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` `15bf2d3866a14c3ebaaf4d0ae0ffdd09f4a392cd65b916ca3b278e5c5b0640f3`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xC9B	9954 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111713_002.js` `5e9e078cb4a4e967317297c5ecfe2cbad8923d140140a9bc47f0001f93d3d5fe`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x33B3	2389 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` `27920ea41782e3de7681655436ad162917290e5898d36303bc383088d7d66d85`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xC9B	1075 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` `426f076e97abb77d4eb6e2f10ce8051a8b5419e8287ef5dc8c6dd39eed2dbd4d`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x33B3	173 bytes
`legacy_pdfkit_stage_002.js` `f4cd070506ce85b68aa44d12f5c708da46ca82ede771d7b0fe678c46f3dcf80e`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xC9B	1249 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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