PDF malware analysis — malicious · 51259919defcccc5

MALICIOUS

PDF

24.5 KB

MD5: 2f931047252444d4ea8ccfab2a7014ac SHA-1: be2e22bb93ad7654725db9a85a2eb1cae2560848 SHA-256: 51259919defcccc5423f258f54ef9d6e584e90c73741c93e5c529cb6ac78c27f

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript that leverages the CVE-2009-0927 vulnerability through the Collab.getIcon method. The script is designed to download and execute a second-stage payload. The extensive use of string concatenation and eval() calls indicates a deliberate attempt to evade static analysis.

Heuristics 5

Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (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` `806a635be548a82c022d2e9b46d2c8675067d514e2b06755ee7f136ff7b46e24`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3319 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_obj111712_001.js` `030a8f606641b88f178802d850cd4f9cd3afa5188fba3c944334b9e6176071ca`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xEBB	19491 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` `3abee611e2880c7008d248ba1d2b9417ad9bae062a02ebfef8e1f41c12eecc0b`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5B14	1733 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` `1412a09b263e0a64c28cc7f184247102cbe88e4b5ed6b84ed0c0c83087aaa08b`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xEBB	1521 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `56260ee877084f540cef0f510d37690a44fe4906fb712abf977040617769653b`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5B14	104 bytes
`legacy_pdfkit_stage_002.js` `21cac2c88821c0d39ba24c2f0e98d6341e242ef3d0baecfb43d76b38e2959afd`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xEBB	1626 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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