PDF malware analysis — malicious · e3d45df921ea4679

MALICIOUS

PDF

22.0 KB

MD5: c7865196847ddcee5a6a6b6774576f2c SHA-1: 273bcac2c738d276fcd5654303980dc33dc7a559 SHA-256: e3d45df921ea4679e661d2b2b41b6327a0e762f9c2ef9cc4132787f1949d0f5d

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating an attempt to obfuscate malicious code. The critical heuristic firing for CVE-2007-5659 (Collab.collectEmailInfo) confirms the exploitation of a known Adobe Reader vulnerability. The embedded JavaScript is designed to download and execute a second-stage payload, as evidenced by the obfuscated code and the use of common JavaScript functions for code execution and string manipulation. No specific malware family could be confidently identified.

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` `5a8322c672267a1749f707219536871545aef34eca0ac5e8e1b4b73a780782dd`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3735 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` `2c2fe98984934fc6b364796176013021724ce9424922bccbe313050c6020e53d`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x105B	16757 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` `e7c70a4b0bff7b8b329fbdb97fe3b9ef4db143d7575fd8673117d6e1784c0718`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5206	1438 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` `e1ef57e355b39268ad264cc25028a9a0e38b4699b467c94913104d44e9e6dafc`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x105B	1470 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` `c7f916b1ceec5d4bc6e97fff748927bd6afe674eddd32a03cf2adfc57837f10e`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5206	81 bytes
`legacy_pdfkit_stage_002.js` `c8b4a22816e7afd49cbe3c1bd0a6170f67ef291dd9463c240b1cb2f4746dada8`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x105B	1552 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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