PDF malware analysis — malicious · bcc26ab25207c4be

MALICIOUS

PDF

23.0 KB

MD5: d2581a3e01a576fa8738a0cfbdc3fa46 SHA-1: 4cd11bee1c252de36d2be7f7325175fb3506521d SHA-256: bcc26ab25207c4be2f3a40f417700d06ca12a60dddc7820ddc82016c05ac5d07

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript that leverages the Collab.collectEmailInfo method, a known indicator for CVE-2007-5659. The JavaScript is heavily encoded and uses eval() calls, suggesting it's designed to download and execute a secondary payload. The presence of multiple deobfuscated JavaScript files further supports this. The primary attack vector is likely a user interaction with the malicious PDF, triggering the exploit.

Heuristics 5

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (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` `6fe9f94971d856239516022f271c913e62996c30639b3e4950329ac6686251be`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3664 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` `755aa6cda308ac7c21cc60b35c883817fe29ed91d022622dbe3c591fbefc5757`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x1014	17810 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` `dac0d1d755420bda7ab58b58fa2fcf8b8221ec162848f5ccb3c261aba118275f`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x55DC	1505 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` `b579af79fd7915f6e675e253a7062b5e9a1bdf6f0aeb23064fb5f1dc2ce25960`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1014	1472 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` `0b781d18955eb71ca7bfcde5e3fb49a80c0bc79c92eaa499e5b7ba225879cdcd`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x55DC	88 bytes
`legacy_pdfkit_stage_002.js` `0ca250205948e245fbcfd397e12789f0e34d5e46c5692a79ebb0341ceebf81c3`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x1014	1561 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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