PDF malware analysis — malicious · 4332893a46c34846

MALICIOUS

PDF

24.0 KB

MD5: 33b0f194d15dfdbad74f41d62510602e SHA-1: acd3278e890987b224a552a5a8b922ad382b4524 SHA-256: 4332893a46c348467cd39ba4c48fbdb6a5ffcf375801a890d66c79c7638cfd41

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript that leverages the 'Collab.getIcon' sink to trigger CVE-2009-0927. The script is designed to download and execute a second-stage payload. The use of eval() and unescape() functions, along with string concatenation for obfuscation, is characteristic of exploit kit delivery mechanisms.

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` `e3f3ee003b61551e78640dd9dde43818fc89232240f2c9a9e16a8cffbd4bda12`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3431 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_obj111712_001.js` `e8bae1c7a95aa82783bac1bb32e57f79a7a045e858ef94dcf95040727e7c37c3`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF2B	18884 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` `55cfcc7b48f2bb4be3d31dc72c881cf53d531f26cad6996ab14c40e0cc8edbf3`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5925	1657 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` `ec8c134440a9651f3a45a593845bf208445ebaebf6b126d314c8ef3b6649d4a3`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xF2B	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` `95d52c265d60ffad372da99bb3db5c3f0b48fc84b1aaa90902895f12786cdc82`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5925	99 bytes
`legacy_pdfkit_stage_002.js` `60cb2d90531f0debab99dc34af890ac2ce0d109c3e6a530c4f69ec472cca0830`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xF2B	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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