PDF malware analysis — malicious · 3a908d2905d70bac

MALICIOUS

PDF

20.0 KB

MD5: 495c74cf74e2f6cdc97ce13826391ce0 SHA-1: 2e907f6cf93228548b264efa77f5d9728c85d650 SHA-256: 3a908d2905d70bac3c2b064b5751ca2ced888e988fd2a2976ac48fc540c8244d

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript that utilizes eval() and unescape() functions, indicative of exploit code. The critical CVE-2009-0927 heuristic confirms the exploitation of a known Adobe Reader vulnerability. The embedded JavaScript streams, particularly the deobfuscated ones, likely contain the second-stage payload, although their exact function is obscured by the obfuscation techniques. The primary attack vector appears to be leveraging a PDF reader exploit to deliver and execute arbitrary code.

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` `c25b09cb84289177b99812a3013a6257b8240dbe16a2265bfcbfd59a6dfec33d`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3459 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` `9e22dd3756bfdeeb8476ad161708e548b92a0ebc7bc67bd46223f5c4f2d3beec`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF47	14733 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` `b8d432ab9b4b936efeec9d6c8469351627ba230f8d0432b05404265c6507dc27`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x490A	1734 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` `42c6e0dfc1b4e08e336adc8028ccac82b04e3e6e9e4d4a4ebc532ab6cd132eec`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xF47	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 0x490A	100 bytes
`legacy_pdfkit_stage_002.js` `b2ecddcb18c4ef079cecba2e1dc20fa43e775cb610a398a819cd3026b3fb6a3d`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xF47	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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