PDF malware analysis — malicious · b275e8de00ce1cb5

MALICIOUS

PDF

21.8 KB

MD5: 80ed9029d344c7187b4647672246f2d9 SHA-1: a771d1fba0e48478fd1fb6dcac4916059d05fb1a SHA-256: b275e8de00ce1cb53f4214e733f08a5f148c24c47eca6e73bf83c3829d199af5

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, specifically using the Collab.getIcon method. The heuristic firings indicate the presence of eval() calls and embedded JavaScript streams, suggesting the script is designed to download and execute a second-stage payload. The deobfuscated JavaScript further confirms the exploitation of this known PDF vulnerability.

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` `c92cfa85973c20f00251a4d8aa77babfd1771d98bd4fa85ace226b4febe31712`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3969 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` `51be73c5f2309a79f965f17d89acbedb9112619348b3d3f013da6f3979a29764`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x1145	16212 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` `baf00841f54dfd9c906631ac3a075c6dbbd2b94a9b918d9912b2e3e460077448`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x50CF	1571 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 0x1145	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 0x50CF	100 bytes
`legacy_pdfkit_stage_002.js` `01454e59e18753a155671beda1d964965c0fad5ef88cc987a93183f5d55603a3`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x1145	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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