PDF malware analysis — malicious · 491086234daf0c8e

MALICIOUS

PDF

22.1 KB

MD5: ab9417c315286d52eac0fcca904ed00c SHA-1: 0fc053d7e13a56424d19f043372b046441020395 SHA-256: 491086234daf0c8eff3a6e3fbe4dd0f9494ca6474be700e5c8eac41b403799b8

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). The JavaScript is heavily obfuscated but appears to be designed to download and execute a secondary payload. The presence of multiple deobfuscated JavaScript files and the critical heuristic firing for CVE-2007-5659 strongly indicate this exploit.

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` `2ac807de1d5ca94f21d25788363e829d551b2bbcf470fc7c1a20f7f1676cdf0a`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	4083 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` `fcdfd19b65eb82ae7755995276ebf766bb80edff152c5be97ad6b8cfd6cc8eee`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x11B7	16519 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` `22b518d6700a3dfc966ad441799512ed75293e83440ef615832141ef1598cd35`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5274	1424 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` `88cbee19006e6fa3ba103aff722e90877fcc14a8cc3faaf841cf42d58e45d5eb`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x11B7	1477 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 0x5274	80 bytes
`legacy_pdfkit_stage_002.js` `0f7adff45ffd82e1f26d1da9a0a227c1157705c8176d01fbe821ed427f15b166`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x11B7	1558 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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