PDF malware analysis — malicious · 9e65bb64d4940964

MALICIOUS

PDF

12.0 KB

MD5: 9eda0d9deff2325b331fd8d0eec3655f SHA-1: 9ed034ddcf259d02df4fd54562d714df14a62190 SHA-256: 9e65bb64d49409642f54c3b81090d898e03ca60021bb03a555d8f0b1e30d5916

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, specifically leveraging the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo method. The heuristics indicate that this JavaScript is used to launch further stages, identified as 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. These stages likely download and execute additional malicious content, although their specific actions are not detailed in the provided evidence. 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-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` `636348223b1fc9e3c01c7edb458f77684c1414030c9aae7ff960ae36b264ec3a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12193 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `5cf554bcb0f439cfbee999902f4322126e23c79ada6ac59faf1e7a0758278514`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5068 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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