PDF malware analysis — malicious · e1409669b381934d

MALICIOUS

PDF

21.9 KB

MD5: e549d2388e9d47c8ad2d7745d655c30a SHA-1: e0e72376d5ba7c3c237be2509377533893fe332d SHA-256: e1409669b381934d74357ae91cad1d72a48d31e53dbd31d66459e1aaacd6086c

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF exploits CVE-2009-0927 using embedded JavaScript. The JavaScript employs eval() and unescape() functions, along with string concatenation, to obfuscate its true purpose. The deobfuscated scripts indicate that the primary goal is to download and execute a second-stage payload from a remote source, likely leveraging the 'Collab.getIcon' JavaScript API. The high ML score and critical heuristic firing confirm the malicious nature of the PDF.

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` `c69372782d057470b399dbaf7c1aeeb011d305c4686bfb4e33fd56c0aa906b12`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3148 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` `53f9cff2e543ca2066add535fb598b294840eab0d76996221e30a09792d8bb86`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE10	16975 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` `e14a664e87912ecbeacb4a2e5295faecfd08b648779eb26dcb6f7699f08dabc5`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5095	1679 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).
`legacy_pdfkit_stage_000.js` `94902819792db85e5768df37fc5212bc4019f53a26d6565e1a0ecdee049f583d`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xE10	1522 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 0x5095	100 bytes
`legacy_pdfkit_stage_002.js` `ec73599989c7f688ecebd69ef7659c18e348290eb1b66a477bc0b7c6d3eb3ccd`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xE10	1623 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.