PDF malware analysis — malicious · 2ca20f910584a02d

MALICIOUS

PDF

21.8 KB

MD5: 5c84a8180a3d69cc5872b8da38cc1764 SHA-1: ce6385a76a4fc111008b4f3756ec3736b4c24a7b SHA-256: 2ca20f910584a02df72e4f34febe16026a36d4feb1a63a3129f6e8f8bb1acb8c

118 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF sample contains obfuscated JavaScript that leverages the `eval()` and `unescape()` functions, along with `collab.collectEmailInfo()`, to exploit CVE-2007-5659. This indicates the script is designed to download and execute a secondary payload. The deobfuscated JavaScript fragments suggest a multi-stage download process. The confidence is high due to the clear exploit trigger and obfuscated script, but the exact final payload and delivery mechanism remain unknown.

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` `0b777656ed614e051bf0c0ee6cd0e13ed14162a5f587e26b0f564e2686032fa9`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3727 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` `a8bfe89e5c5f0875d67dea2fa8d77a5d1a1e168fc30e6fd2ff0b42c89253761d`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x1053	16492 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` `a69a8c8d70bbd5bbf69345db6112cc4e2136fa2a662d92a0fbf8bb93174e6f45`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x50F5	1520 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` `e1ef57e355b39268ad264cc25028a9a0e38b4699b467c94913104d44e9e6dafc`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1053	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` `45f33a2b6011dbedaffbca7d7ed47c6f494a02676d7ebb603cee90d70a37c9b2`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x50F5	79 bytes
`legacy_pdfkit_stage_002.js` `91691f3ccabd930d862b31957a50e8f65d4a583022cb8ffe9a2e49aa103eb51a`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x1053	1550 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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