PDF malware analysis — malicious · c29c992da6df9f47

MALICIOUS

PDF

21.2 KB

MD5: ac6fdf54c946bf9a6c8175c94f3546fb SHA-1: 869b67664487bd08d61ad4cccebd5b384eed2222 SHA-256: c29c992da6df9f47f425a9a4fc4300d377884d564e1065e26fe6485a39a5b666

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 CVE-2007-5659 heuristic firing confirms the exploitation of a known vulnerability in Adobe Reader via the Collab.collectEmailInfo method. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the presence of multiple JavaScript streams and deobfuscated scripts.

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` `c0058ad60f54a27316c29f8d442d91fec4fc7deaee8c46b3a6699503533d4264`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3878 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` `042b886815a1251555e6351eaff39d0d2ecbcf2771c55547f2b50dc241aa5849`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x10EA	15716 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` `9cdd6fa73c40368c3b5c99d5c445b61a0883ed588b4a7abc885e70f47c4af86e`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4E84	1541 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` `3ce2f209b540fb36eed49cc31ae3f37f7cea4ebc079e3cbb3b999b83a97c1eae`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x10EA	1469 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 0x4E84	79 bytes
`legacy_pdfkit_stage_002.js` `79309b29197edb84f42a6ee157e0d3ecc430bd28dff48f85ffad3a050372c41e`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x10EA	1549 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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