PDF malware analysis — malicious · 43739f5d4a4e4334

MALICIOUS

PDF

12.4 KB

MD5: e715276046e580976f6602645658ed79 SHA-1: a0e5269b8a3dd8e3534f125139eed38b291b35b5 SHA-256: 43739f5d4a4e43346225768a5954f6322c349cf22cbc4560dac609fbf581c40a

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2007_5659, specifically points to the use of 'collab.collectEmailInfo' for JavaScript execution, a known method for exploiting PDF vulnerabilities. The presence of deobfuscated JavaScript files (legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js) further indicates malicious scripting activity. This scripting is likely designed to download and execute 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` `52e3ab4da28574d6adb061cf6bf1a1ef40085cc6a50cc677f1d195359140abca`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12555 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `3aac4d1b49280495857fd2db7559f2bb41e10ec79b18f18a7b531e676e932ba7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5251 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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