PDF malware analysis — malicious · 4edb3d86b789c18a

MALICIOUS

PDF

20.1 KB

MD5: f1e093630fbabf1e5215dcc0ff42cace SHA-1: 1ebb301de1c3342cd67e1d73ad9ae9ef828170b6 SHA-256: 4edb3d86b789c18a0b97f62d70dbd6c3f771905845e2b9ac49419c9afee11c7d

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscation. The critical heuristic firing for CVE-2009-0927 confirms the exploitation of a known Adobe Reader vulnerability. The embedded JavaScript is designed to decode and execute a secondary payload, likely for further malicious actions.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `9084657dcd40721a57de8f6f3b139c5c427b86b6770c9f36bf2ce6d7cadaf2c1`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3618 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` `1ca7b77165f5420ed3a34e34da3089caf5f584bfc18d35d4d490b955b2dd2460`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xFE6	14598 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_obj111713_002.js` `2b1ce19747160a2e673ece75a8b641f8103c4b9c7ac03fbd3f8abe20463258e3`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4922	1794 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` `9794abf9d82c05d7fd13fb3a602a051400de9b105a53edd0deb1d163cb9f0eeb`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xFE6	1523 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 0x4922	100 bytes
`legacy_pdfkit_stage_002.js` `13fdbc704112ff048c0e44053d4dee53a3edefec9f6031e76499b70efa6a88ce`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xFE6	1624 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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