PDF malware analysis — malicious · e2a2664e7ca5de0e

MALICIOUS

PDF

20.9 KB

MD5: 0f235032f63814fce0bac4eeb34a4bd7 SHA-1: 67aa9c637106e25c8416395423f9750d0862d097 SHA-256: e2a2664e7ca5de0e94ed804f0bb80955138b560de30952fbccbf2c58156c0695

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains obfuscated JavaScript that leverages the CVE-2009-0927 vulnerability via the Collab.getIcon method. The script uses eval() and unescape() functions to deobfuscate and execute further stages. This indicates a likely exploit kit delivery mechanism designed to download and execute a second-stage payload.

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` `1e40e642ae3864541015be62c31f393bedf7d72050509590b71bbe76b55e8e45`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3451 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` `b4d98ab387b6c3ec13958787ea49e44a8f73308a2cfae25d236750ff4243dee9`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF3F	15769 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_obj111713_002.js` `f6ecb1e60c62d2aeccc8bf4ad6456b787575cfaed64437fc812666967e60529c`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4D0E	1616 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` `42c6e0dfc1b4e08e336adc8028ccac82b04e3e6e9e4d4a4ebc532ab6cd132eec`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xF3F	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` `407624ceb11bdfcccd03817d5cc6229f3a3f8dfc15051e1567d07f2b81bcede8`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4D0E	100 bytes
`legacy_pdfkit_stage_002.js` `b2ecddcb18c4ef079cecba2e1dc20fa43e775cb610a398a819cd3026b3fb6a3d`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xF3F	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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