PDF malware analysis — malicious · 4632442f37473bcc

MALICIOUS

PDF

22.8 KB

MD5: 7810482ca921d29056b0877f8e49e12d SHA-1: 880c9d49d39fbd107e7a9da217bd90f515164c76 SHA-256: 4632442f37473bcc7e240aff748f6fbffae6c96662a1a85b2eaabb4993b104fb

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains embedded JavaScript that utilizes the 'eval()' function and 'unescape()' to dynamically construct and execute code. The critical heuristic 'CVE_2009_0927' specifically points to the exploitation of a vulnerability related to 'Collab.getIcon', commonly used in older PDF exploits. The obfuscated JavaScript suggests an attempt to download and execute a secondary payload, which is a common technique for initial access.

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` `6d020f6ac0d7738552d8c62f94a1be77755b511a7ed60b3f6cb73edca2153f18`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3871 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` `380a92cbe91e0ef685c46a171a3eb4d1cb5e74cf0b3aabfd8157bd6342c9a4fb`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x10E3	17227 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` `8200ee07b2bb0ab53c9695ef6efe3f4f005fb290b3b0c826f21605b2f987b124`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5464	1687 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` `a7bf9e8f3472d8e456111af54d3cbfd9bd06c7e59489254ed4481e1c4d057ace`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x10E3	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` `95d52c265d60ffad372da99bb3db5c3f0b48fc84b1aaa90902895f12786cdc82`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5464	99 bytes
`legacy_pdfkit_stage_002.js` `7983f75ca58807096a192c0596a945b237533ae2d204b86f0eeae10c6011045b`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x10E3	1620 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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