PDF malware analysis — malicious · f665c6ad031a697c

MALICIOUS

PDF

11.8 KB

MD5: 08928e4995e4370861765dd4c5535d04 SHA-1: f943c5b26b6fa4ba2ef85eab0b666cc6d0edbef5 SHA-256: f665c6ad031a697c6b8cbf1aa7b5fe5459df90f2a452dcc563fd5a7dd8ace4ad

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates that the JavaScript is used to exploit a known vulnerability (Collab.collectEmailInfo) within Adobe Reader. The deobfuscated JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, likely contain the logic for downloading and executing a secondary payload, a common technique for initial access.

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` `8ff0f3222569d0146debb19e0c5ed20e32a7d4cddc0c9d37fdd9c37147f7d3e3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11919 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `31697f7e94f99d9fe4d830b68f5f401e0771da3439e7d68b6424b5fc3af3e9f6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4970 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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