PDF malware analysis — malicious · bb3dc151da7886d6

MALICIOUS

PDF

17.1 KB

MD5: c2b0996ac8f80646fa4abc60feb064c9 SHA-1: 5f09bbe0ddea96e5d109084361780ce62695bcf7 SHA-256: bb3dc151da7886d65a16bd71196fe6b0babee7f67f3046e14b28d46eb9cc5f37

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains embedded JavaScript that utilizes eval() and unescape() functions, indicating an attempt to obfuscate malicious code. The critical heuristic firing for CVE-2009-4324 confirms the exploitation of a known Adobe Reader vulnerability. The script's structure suggests it is designed to download and execute a second-stage payload, likely from a URL that would have been dynamically constructed or deobfuscated.

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` `51a22eadc2fd92144a0640c8ce59780ecb425f4c20ea1600b0dfdecf4c06cdb7`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2821 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` `42f581b8577a37fcd5bad1c92f4abf9a847b6509cd8a4f2f88b1e18f586ede3a`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xCC9	11522 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` `a8285843b549122a2df3ded721a7de6e0fd0973cf38e083098937101476d6f58`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3A01	2595 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` `a6d9a11b5aaaf3e69687a3d0a14ad130cc857a3e6206003f4afc5e25e330d801`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xCC9	1084 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` `fb4928ae59deb310ed1e46c1ad3306a58158258ec2cb63aa61e8e9e1e7d0f541`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3A01	175 bytes
`legacy_pdfkit_stage_002.js` `0c957858a8760c3c08cc310fd782c9899c52473be81aadb5c59a4a89e0836442`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xCC9	1260 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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