PDF malware analysis — malicious · c8383f356625959a

MALICIOUS

PDF

12.8 KB

MD5: 30ef035f915ea6d3883e3f014a7ccb1c SHA-1: f4bd69f56477aabf738b4498300f6a4c13e82035 SHA-256: c8383f356625959a2ec88c988f718274a775b0bf40d4abb64f0acd7aac183e7c

140 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/Object

The critical heuristic CVE_2007_5659 indicates the exploitation of a known vulnerability in PDF handling, specifically related to JavaScript execution via the Collab.collectEmailInfo method. The presence of embedded JavaScript streams and deobfuscated JS files (legacy_pdfkit_stage_000.js, legacy_pdfkit_stage_001.js) further supports this. The ClamAV detection as Pdf.Exploit.Agent-36064 confirms its malicious nature. The overall attack pattern suggests a PDF-based exploit designed to download and execute further malicious content.

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-36064 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36064
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` `a5c8f0f722df4dd9876a0087e1eee65bd3020c5995f94f6729f7e17f3f3677a0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	331 bytes
`legacy_pdfkit_stage_000.js` `6914a00e5ac73b3e3f32426368537a656d41ed8f78ade2e171b57eadcc873683`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	11900 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4d93f32f25bfe53999140d25b85deca8d889d22875fb8265a1e2a2bd6b43577b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	4950 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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