PDF malware analysis — malicious · 32a01222844ca082

MALICIOUS

PDF

22.3 KB

MD5: 2a1b25a33463e344735c263467225216 SHA-1: 82c683f285e872d141543e864250d15515d5db82 SHA-256: 32a01222844ca082869460a5236ba49d3d6c1b19377b6d8940aec7ab846a84f2

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains obfuscated JavaScript that leverages the Collab.getIcon function, indicating exploitation of CVE-2009-0927. The JavaScript is designed to download and execute a second-stage payload. The presence of multiple embedded JavaScript streams and the critical heuristic firing for CVE-2009-0927 strongly suggest a 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` `10315ab69857a2fb1e8ab84dada208bf06d482a075c8f1a17c9cbd6cc7c6cce4`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3488 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` `85bfdf33b2d04667da1c9a36805000fb2c7ecc1980e58a030976b166164603ec`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF64	17112 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` `d439166029eac62e5bb49d18b5d18d353426567be4445d1cb74ea6256b139740`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5272	1661 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` `f89df567ac1524aa97d7d1c2e318640fc4fa1525d608905c9904da2f1b756863`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xF64	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` `ba2f0f3fc1ccf57bbbd5495b593ed4317f3b5c06088ac41a83386550dc334beb`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5272	109 bytes
`legacy_pdfkit_stage_002.js` `e225a001725b4ba8468cd68870225ce1ac88c312fae1cc9342ca2a10af9a4418`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xF64	1630 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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