PDF malware analysis — malicious · edbf41da75b140d0

MALICIOUS

PDF

11.6 KB

MD5: 1a650a2499d083f9fd6b1e4f0e90fea4 SHA-1: 0b7deb329ef0ffab4477e8c7971bd41fb0847d54 SHA-256: edbf41da75b140d0eca11eb71b9fcce3f5c68b4cb66f90bb2ce0d4485d99e98c

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV (Pdf.Exploit.Agent-36065). Heuristics indicate the exploitation of CVE-2007-5659 via the 'collab.collectEmailInfo' JavaScript function, which is used to construct and evaluate JavaScript code. Deobfuscated JavaScript files were extracted, suggesting a multi-stage attack. The primary intent appears to be the execution of further malicious code, likely a downloader or dropper, leveraging the embedded JavaScript.

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` `c3d1983b98a1f6a6a1a07ea59c20054067dfe91f1c3a8ebfd8d8b4312e9bdbbb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11817 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `cb8a10f50325796849f81feecc3115e9aba391dca5d20c9963066ccf425d5e88`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4865 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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