PDF malware analysis — malicious · bb8b316491f179da

MALICIOUS

PDF

19.5 KB

MD5: 561c19e164e1b9b0e3bb6299157553b5 SHA-1: 602216f8a1ed839e0d8ce2ab47f12d34af6f22ae SHA-256: bb8b316491f179da017f06ab4c632a2f646039fc30399369fa8a18a492156aa9

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and a critical CVE_2009_0927 alert. The embedded JavaScript uses eval() and unescape() functions, common in exploit kits, to decode and execute a secondary payload. The specific exploit identified, CVE-2009-0927 (Collab.getIcon), is a known vulnerability in older Adobe Reader versions. The script's intent is to download and execute further malicious content.

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` `e4fcf117f884982ed38cdeea53d49ef6bbf0fe85bbba682673fd0fee4950f719`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3489 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` `7b669af3c3dd2443acde15fad72572752b305bf32d0afd2ddb8d6013be590dc1`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF65	14072 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` `d3e3eaf2c9fd127126d6362cd4b389b83f8eabc025ab50e71bec0d342de7908d`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4693	1865 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` `42c6e0dfc1b4e08e336adc8028ccac82b04e3e6e9e4d4a4ebc532ab6cd132eec`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xF65	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` `6fc9e08010ebbf0273b3dce549e067bcf708a4844609148db5ffdecb9cd594cf`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4693	108 bytes
`legacy_pdfkit_stage_002.js` `0582a6755b248ecfdc150eab2abff7b04cc33af09cd6c88274cccd601554f887`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xF65	1629 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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