PDF malware analysis — malicious · 572dc866f4f4e631

MALICIOUS

PDF

23.5 KB

MD5: d02616c109de4d8e42532e36f2b4e2c9 SHA-1: ac67058146b6f1da4befc2d95fc8f2cd7ce0da8d SHA-256: 572dc866f4f4e6319c9f7ca69dc5e4266dcfc16c9bc192d10146568d40d51300

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 (Collab.getIcon). The script uses eval() and unescape() functions to decode and execute a payload. The presence of multiple embedded JavaScript streams and deobfuscated stages indicates a multi-stage attack designed to download and execute additional 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` `1a62376e08c2bd74abd223a8560a0103757379eed22d4d2a8eace6231f732f0a`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3436 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` `e0c2de17fd1f3e8c8acd3bf90836534f5ef180dcf8962cc542be163e05ba8b31`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF30	18364 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` `83c95e342ce133fc6181da417d1440fcaf1e7d2984cc6dcd88cccd8b56a7e154`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5722	1717 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` `a7bf9e8f3472d8e456111af54d3cbfd9bd06c7e59489254ed4481e1c4d057ace`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xF30	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` `95d52c265d60ffad372da99bb3db5c3f0b48fc84b1aaa90902895f12786cdc82`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5722	99 bytes
`legacy_pdfkit_stage_002.js` `7983f75ca58807096a192c0596a945b237533ae2d204b86f0eeae10c6011045b`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xF30	1620 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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