PDF malware analysis — malicious · cc22ec033ef8db4e

MALICIOUS

PDF

22.4 KB

MD5: 2853ca47e9e88511be03cf76f2dd8c9f SHA-1: 62b6f2d5c9e758260a28664501a6a575196835ad SHA-256: cc22ec033ef8db4e6ea05bf94be1f4ca85970cbbaaff3caedba0ebe3ae2fe380

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1071.001 Web Protocols T1204 User Execution

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability through the `collab.collectEmailInfo` function. This JavaScript is obfuscated and uses `eval()` to execute, indicating it's designed to download and run a secondary payload. The presence of multiple JavaScript streams and deobfuscated stages further supports this. The primary attack vector is likely user interaction with the malicious PDF, leading to exploit execution.

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` `39f15df9eb5efd5224faa493088900eaebcb56418fcc846e7f9f793ff68e3d6e`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3487 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` `d29069eb79ec9717d0666f2e00371adc2f9c58f7dda180c4fca9fa9506caa95a`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF63	17508 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_obj111713_002.js` `2837a710da3af4c4f6231e0feb5e984a7cf0561d6fde765b064d3044fd6156cc`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x53FD	1404 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).
`legacy_pdfkit_stage_000.js` `6a71fe04d9f1e9a3f90c4b70ff84c50da961115beee28510bef672a68ec30c65`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xF63	1474 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` `66201566cb7b94b96d78c07e61c80e11578b5125ea85cc864e3cc788698af3dd`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x53FD	79 bytes
`legacy_pdfkit_stage_002.js` `d5d5921cd83f724d12f7d10577d9138013bb083c59cef4b80b0945db73172222`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xF63	1554 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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