PDF malware analysis — malicious · 594657fc02dad31d

MALICIOUS

PDF

21.9 KB

MD5: 26613d117f79f4e02c13d509de9531a5 SHA-1: 8c07d5662628cc1ff900ba8550ada35d3601855e SHA-256: 594657fc02dad31d5b5ef145ba980a2d4dc4afad2a70f5b253dc0f8cc9823826

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The critical heuristic firing for CVE-2009-0927 indicates the PDF exploits a known vulnerability using obfuscated JavaScript. The embedded JavaScript streams, particularly the deobfuscated ones, confirm the use of eval() and unescape() functions, common in exploit kits for dynamic code execution. The script's structure suggests it is designed to download and execute a secondary payload, a typical behavior for initial-stage malware droppers.

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` `f6cb7f8bc985991a2a8f5b2109288022ab6dbea2cebfae8b21114b09df6b11d9`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3271 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` `b1bafc3d029566bd0cb30afd6d778bc0f1ce10595475aa48647253cf286d8a0a`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE8B	16888 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` `b75828d602cecf4a8fd3bf18b811261d2884e307edf855fd6b2a2f2358bd79f9`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x50B9	1714 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 0xE8B	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` `1397a77c63e5e8be02a059fd3c671fb708b92cb64d00ded4f2045e71093dec16`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x50B9	99 bytes
`legacy_pdfkit_stage_002.js` `184b3fff689b91861d96792016bdb3afd06fbc3a1e3008904b8d5106c94da580`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xE8B	1621 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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