PDF malware analysis — malicious · 265c5f8c5ce422f6

MALICIOUS

PDF

12.5 KB

MD5: 33e6b40f71b56ae19394a3b5567b0933 SHA-1: 4943de9e2a10504179051c47fdc4c5de088fc7ba SHA-256: 265c5f8c5ce422f6ce404f3b00790215702e3e28ffd78f026863d99b989a282a

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the exploitation of a vulnerability related to the 'Collab.collectEmailInfo' JavaScript function, which is known to be used for arbitrary code execution in older PDF readers. The extracted JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', are likely responsible for downloading and executing a secondary payload. The ClamAV detection further confirms the malicious nature of the file.

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `0e24028f44de1b6bc9616eb507fd1567a2dc936d52cbf7596e8b1e8039453af5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12372 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `daa790927c36b5f7352b7a0d70c10491eb7e005c7fdeb35d91e888df8fcac499`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5030 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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