PDF malware analysis — malicious · 3e0000da64b30268

MALICIOUS

PDF

20.3 KB

MD5: d7591d1787a0d9bd89ba1d902f527c3c SHA-1: 1da67c083c7d4249cd3c0ac3e5cb3603a597ce7c SHA-256: 3e0000da64b302688f586f354ceb176e174399a877892c5841037ceff09f1439

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscation. The critical heuristic firing for CVE-2007-5659 points to the exploitation of a known Adobe Reader vulnerability. The JavaScript is designed to download and execute a secondary payload, as suggested by the obfuscated string concatenation and the use of eval(). The confidence is slightly reduced due to the lack of a specific family attribution.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `b781d050c39a60d6b33098cd25eab6029ab13d0e051849d55f29425fed46c215`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3556 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_obj111712_001.js` `f858862a3d49c38e8081ad41ff59326e1c82535310c4e20f481b0ff9c8c47c1a`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xFA8	15124 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` `cf5873b0f76bbd2147a5a67ef53f305fc2e3e5e11a0e069064163f313a3d4197`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4AF2	1480 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).
`legacy_pdfkit_stage_000.js` `766baf6497f7a89f8007ccd745936d84f9f13c4ff40b4d68f329e679cfba61e4`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xFA8	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` `893b6a69a6b1f96ef94da875e2c6de5a6ab10d72b7676187c78f81073910b29c`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4AF2	80 bytes
`legacy_pdfkit_stage_002.js` `003aa64a768ff87996304299daae75b3b7cbaa76e4656695c388a98f40129ceb`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xFA8	1555 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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