PDF malware analysis — malicious · cb19e93ea9e82a79

MALICIOUS

PDF

11.3 KB

MD5: 1a5a64af31d2a09fe462933bef2d27d5 SHA-1: cdc822978ec71d8166dfa47f3b567b5535c1b37f SHA-256: cb19e93ea9e82a79370c2caeea126f09a05d8ddb2ab9e5db2e1a46ba5383382c

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious Link

The PDF file contains embedded JavaScript, specifically leveraging the 'Collab.collectEmailInfo' method which is associated with CVE-2007-5659. This exploit is designed to execute arbitrary JavaScript. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') indicates a multi-stage attack. The ClamAV detection 'Pdf.Exploit.Agent-36065' further confirms its malicious nature. The primary attack vector appears to be exploiting a known PDF vulnerability to run malicious 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)
ClamAV: Pdf.Exploit.Agent-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `2e5f284a54a2f9b0357bff08adfb05a1af9262dbf02341de24da9eb88771ee1b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11665 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a01cc557f9e7b69e9942646ae062eed4c5587c10ff645c839d9971a5799b03d3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4801 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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