PDF malware analysis — malicious · 7897b4cd53c30da1

MALICIOUS

PDF

12.3 KB

MD5: dde9f92dd6964cc94c5c2aa88415834f SHA-1: 07cbbb41a6bcff78fc3ff31247d1b704ace8bf1f SHA-256: 7897b4cd53c30da1ad86cc56c8b781e91f91766fedcf8bd50fc25820b690f89a

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2007-5659, indicating an exploit attempt. The embedded JavaScript streams, named 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', are likely responsible for executing the malicious payload. The exploit leverages the Collab.collectEmailInfo method to achieve code execution.

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` `d76d4e25baf9e25929f13cc89f076342d468a9d657a6c38d6a05aa899d1df3fb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12593 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c7bd4cad4192a93b4c0f61b8d98bc3434c174c406fbd9448837f7dd7c23dc63f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5244 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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