PDF malware analysis — malicious · e768476dbce81262

MALICIOUS

PDF

21.8 KB

MD5: 6b0a0c4448171138eb282d5b56774923 SHA-1: 45e7237c04651dda25c8369efc9faffea93b63b3 SHA-256: e768476dbce812621a13da547ef3eb5eafe4637c0d282c7feb94a2516f17a2ab

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1059.007 JavaScript

The PDF sample contains embedded JavaScript that utilizes the `eval()` function and the `Collab.collectEmailInfo` method, indicating exploitation of CVE-2007-5659. The JavaScript is heavily obfuscated but appears designed to download and execute a secondary payload. The presence of multiple deobfuscated JavaScript files further supports this. The primary attack pattern is leveraging a known PDF vulnerability to achieve arbitrary code 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` `74821be871c8e4ea792ad94886a4b813144cf83790cf2c7d270289ce32c9be3b`	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 4 long base64-like blob(s).
`javascript_obj111712_001.js` `7fc713f0d3ff3834cd0d2eaf0ac0cf760e0d5d824ee61a75321ccc3b7587bd80`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x1014	16562 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` `3bd2f9fc10ef50081d82bf95d644cf4a4e015430e90bca2ac5b9aee3f8d039ed`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x50FC	1546 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` `1b25609bd80f613d5e9626b1a1c3aece135a1066668ec3c15bb467e8b1b6d7a1`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1014	1473 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` `45f33a2b6011dbedaffbca7d7ed47c6f494a02676d7ebb603cee90d70a37c9b2`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x50FC	79 bytes
`legacy_pdfkit_stage_002.js` `0907a13741065e4ac2c7e34f7fe1594488c8548d55ddf2da7ed26f2668894b17`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x1014	1553 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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