PDF malware analysis — malicious · a40fd9ed0e3b9277

MALICIOUS

PDF

24.4 KB

MD5: 236d59c7722528c04e002da33adb1dfc SHA-1: 3e916a6cfb82cfb827373ce20353fdc771349722 SHA-256: a40fd9ed0e3b927798eeb627cf9fe5d9ee87c91afa8ac51d3f814474f0f91efe

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1059.007 JavaScript

The PDF file contains embedded JavaScript that leverages the CVE-2009-0927 vulnerability (Collab.getIcon) to execute arbitrary code. The JavaScript is heavily obfuscated but appears to be designed to download and execute a second-stage payload. The presence of multiple JavaScript streams and the use of eval() calls are strong indicators of malicious intent.

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` `4f0b8e95456805beb5996a43a67922e8f112b75d08e05dc20d6761cd1d617bb7`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3278 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` `534a6e7a1dc4cd711970c38b1d5b1830916618bc6a139a38844eac51a34b230a`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE92	19266 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` `600e24d53c8bed063df58d89c728e5bbb3244728551ea552abf1b2e7d182dd4e`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5A0A	1839 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 0xE92	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` `67de3c3ad3836979a457d9290cd1f855faa56747d6ad6d553e3be92fbc2958b0`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5A0A	106 bytes
`legacy_pdfkit_stage_002.js` `e7163e3f3832a2054105849abfc6cffa0c6d677471e7e17aa63b4e5cf9a4ebad`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xE92	1627 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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