PDF malware analysis — malicious · 8c083904874ba681

MALICIOUS

PDF

17.5 KB

MD5: 82751331b53bbf5090f491060ad27568 SHA-1: 1ecabf240a1a5a89d6f88afc508c212cdfa0a7c4 SHA-256: 8c083904874ba68180b8604cf687e335bda11c84112da65206890360da966b38

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1027 Obfuscated Files or Information

The PDF sample contains multiple embedded JavaScript streams, with a critical heuristic firing for CVE-2009-4324 related to media.newPlayer. The JavaScript utilizes eval() and unescape() functions, indicating obfuscation to hide malicious code. The primary intent appears to be the execution of a second-stage payload, likely downloaded from a remote source, leveraging the identified CVE.

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` `11a3e049f6515da3cfbde897b08296a7456ba80994b853eb0fe402f87d513e70`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3161 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` `b9f7007c57281996e204f7e5a8c59f466ddf7aad733bdb768136ea07478c9b3d`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE1D	11987 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` `c987a17251da37a15741cded103900c57f0b4de6c7c3c24b15cb773ad081eb71`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3D26	2229 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 0xE1D	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` `e8f2b210c6dfbb81018e11f8655e9196095c1a3bf2e67c36e34b5dea911d1afe`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3D26	170 bytes
`legacy_pdfkit_stage_002.js` `830bcc229eb8abaf4dca1d887900bd7e35f4161db6fc5fa573d7f24055a8b47e`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xE1D	1251 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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