PDF malware analysis — malicious · 4712766b2bfeca11

MALICIOUS

PDF

21.3 KB

MD5: a129b77184155071791c2d2edc2b5207 SHA-1: 94a5c5c97260f03f6b770c2f7e69c16da5c9e832 SHA-256: 4712766b2bfeca11006b7492e9207ebe5f7560f642067d211ac9da452e13d45b

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript, which is triggered by the CVE-2009-0927 exploit targeting the Collab.getIcon function. The JavaScript uses eval() and unescape() functions, indicating it's designed to download and execute a second-stage payload. The obfuscation and use of known exploit techniques suggest a malicious intent, likely to compromise the user's system.

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` `8432e8c683c09a68e0097597ed9ad3c145a6ddaa83e6434297371690cb9b7600`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3555 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` `52e9ec071d0dcceb4770037feac0543d7abf97699676cefa502a7ff0412079d7`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xFA7	16027 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` `520814d065f2e42fefa09bc54f6cdf1d802be204162a36c4a875c9af3b590c8b`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4E78	1691 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` `f89df567ac1524aa97d7d1c2e318640fc4fa1525d608905c9904da2f1b756863`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xFA7	1520 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` `1397a77c63e5e8be02a059fd3c671fb708b92cb64d00ded4f2045e71093dec16`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4E78	99 bytes
`legacy_pdfkit_stage_002.js` `0039977f928e39f39a1396c65af6df099edb021f77e9085f9dbfc13080e52074`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xFA7	1620 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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