PDF malware analysis — malicious · ebcf74b5d849397e

MALICIOUS

PDF

12.7 KB

MD5: cba7004496541d9eb4fef0069bdee9f0 SHA-1: a9862e0234f61f7461df169bf483bc8be4bc7851 SHA-256: ebcf74b5d849397e11e093d3a3df8df79d6c36c44dbc4826df444a190b03fafd

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript, flagged by multiple heuristics including a critical detection for CVE-2007-5659 related to the 'collab.collectEmailInfo' function. This function is known to be used in PDF exploits to execute arbitrary JavaScript. The extracted JavaScript streams, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', suggest a multi-stage process typical of PDF-based malware delivery. The primary intent appears to be the execution of this JavaScript to download and run a secondary payload.

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` `3baf7729dd4958e155fda7d22d5dfea57e9ffcf78e03d457ab4ba536eaad1fbb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12482 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `58302603dd0e2c760283c5a3ad4329a106fe7e6bedd3323b6deb85970ded9813`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5161 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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