PDF malware analysis — malicious · f3a979401c237210

MALICIOUS

PDF

24.5 KB

MD5: a62254c1402360e7961d7690aed37e87 SHA-1: 2d4c6bceb89d0222838ed27bb2bfc23468ca26a2 SHA-256: f3a979401c2372100336de3d106f7f0b0a2f5dde694227bc097185ab0363ed89

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes the eval() function and the Collab.collectEmailInfo method, indicative of the CVE-2007-5659 vulnerability. The JavaScript is heavily obfuscated, but the presence of eval() and the exploit trigger suggest it's designed to download and execute a secondary payload. The extracted JavaScript streams and deobfuscated files confirm the use of obfuscation techniques and exploit-related code.

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` `b105f3f7321502c943b6e2d9d54a5f61f8ebc2b455a56823c7df54b4c6f325d9`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3479 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` `a47c574fc30930dc895b199e72f9934ce5676db0e5e58050727ec1b807c5285e`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF5B	19540 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` `c5fef14e9cddc1457db2b851d1e6105f12e645abf5b6519c2c5dffe39269c9e0`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5BE5	1452 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 0xF5B	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 0x5BE5	79 bytes
`legacy_pdfkit_stage_002.js` `91691f3ccabd930d862b31957a50e8f65d4a583022cb8ffe9a2e49aa103eb51a`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xF5B	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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