PDF malware analysis — malicious · 97ff14f112e4de12

MALICIOUS

PDF

16.2 KB

MD5: 38740f00b2fe191d72b6f612b031ca6b SHA-1: 91ffa56d4203d04855e9314cf76286ffb64b19fe SHA-256: 97ff14f112e4de12765e95bcc8a0681f5572470a56a97c5988472bc4161abcf6

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and a critical CVE_2009_4324 alert. The JavaScript uses eval() and unescape() functions, common in exploit kits, to decode and execute malicious code. The presence of 'media.newPlayer' points to the specific CVE-2009-4324 exploit. The script's intent is to download and execute a secondary payload, typical of a downloader or initial access stage.

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` `24b31393e6553e74a9e9218c142103c569fa190f4415c68a9cc6a4525030c835`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2600 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` `645888480ac416c1deaa4a0e9068fe7d8a9f26ec3395012232ffd6417c0529c8`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xBEC	11400 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_obj111713_002.js` `56cc956c7bb376707461fae1dc3106c0e6572d4c3f80406e1d01c98d65bf1037`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x38AA	2016 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).
`legacy_pdfkit_stage_000.js` `14d9d23d619682a659b666d1537fbe47a8cc4db49b0c37d63714847d39b24a42`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xBEC	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 0x38AA	165 bytes
`legacy_pdfkit_stage_002.js` `376cfd6a3f51ed54b8d4ce85d16c3e84d41b9f4c131e27b4ab8715d3f12255e2`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xBEC	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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