PDF malware analysis — malicious · 46263a18a8c1df8a

MALICIOUS

PDF

20.0 KB

MD5: cf6e8b148ad6d5304e7eac7c51248ddf SHA-1: b33bfc67f5073b60dfa023a2c9476823971d743f SHA-256: 46263a18a8c1df8a857bf6ebaa8adc5e6b402a164095fdd6ce7b962aa493c8eb

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes the 'eval()' function and 'unescape()' for obfuscation, a common technique for exploiting vulnerabilities. The critical heuristic 'CVE_2009_0927' specifically identifies the use of the 'Collab.getIcon' sink, indicating an exploit for CVE-2009-0927. The embedded JavaScript streams and deobfuscated scripts suggest the primary intent is to download and execute a secondary payload, characteristic of a downloader or initial access exploit.

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` `6632e940b513f77a334ceea904eddcd2a881b574a812820ec1a27be662a1688c`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3171 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).
`javascript_obj111712_001.js` `f69a2642068e623ad83fda1d2265a3fad678a445f376d39c94b27ce274e03d22`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE27	14947 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` `749514a28b15a0e1365edf254dcdee61b83d0020f653a4904dddbb9a19b0f9c2`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x48C0	1755 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` `ec8c134440a9651f3a45a593845bf208445ebaebf6b126d314c8ef3b6649d4a3`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xE27	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` `407624ceb11bdfcccd03817d5cc6229f3a3f8dfc15051e1567d07f2b81bcede8`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x48C0	100 bytes
`legacy_pdfkit_stage_002.js` `01454e59e18753a155671beda1d964965c0fad5ef88cc987a93183f5d55603a3`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xE27	1622 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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