PDF malware analysis — malicious · 37787d655dcbdf0e

MALICIOUS

PDF

21.6 KB

MD5: 62391e88cb95aacb3963aaf07547cf93 SHA-1: e2faa28453f6a65908cc0438b806cc7fc226ca52 SHA-256: 37787d655dcbdf0e3657ef111ace83dd12da08112074227a4fc3476796b2e532

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF document contains obfuscated JavaScript that utilizes eval() and unescape() functions, indicating an attempt to execute arbitrary code. The critical CVE-2009-0927 heuristic firing confirms the exploitation of a known Adobe Reader vulnerability via the Collab.getIcon method. The embedded JavaScript streams and deobfuscated stages suggest the primary goal is to download and execute a second-stage payload, though the specific URL is not directly visible in the provided evidence.

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` `078cf07b7c2f5b0fdf511a82a02db1502bb28269c8902eff542a32d4a099fc13`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3590 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` `cdba06487d79394752bde545c91cdc38e4ab4d70396cd6847d8df1ae92ff9cc7`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xFCA	16176 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_obj111713_002.js` `51c353712550b7dc833f95c01307c52efcbcea9cc416c3c51b7cff82f1a1660c`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4F30	1812 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` `1412a09b263e0a64c28cc7f184247102cbe88e4b5ed6b84ed0c0c83087aaa08b`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xFCA	1521 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 0x4F30	100 bytes
`legacy_pdfkit_stage_002.js` `e27ccc1eaae955736a0d39666fa1e0ea66bcbac99f90ce5d404c6eb84b9eff2c`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xFCA	1622 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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