PDF malware analysis — malicious · 80b0e8d7d9776bcf

MALICIOUS

PDF

11.3 KB

MD5: e9bb794adffc745ecb302b9436d804d8 SHA-1: d89b89e1e7253d4b5421b7ee73def60927265141 SHA-256: 80b0e8d7d9776bcf8336415b2fc93f81c7d19a26e59d9dda2b42d6dd2b633a43

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified by multiple heuristics including CVE-2007-5659 which specifically targets the 'Collab.collectEmailInfo' function for JavaScript execution. The deobfuscated JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', indicate a multi-stage exploit. The primary intent appears to be the execution of this JavaScript to download and run 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-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` `0cd3b06e08e6b5205a14792dbfd4054afaed8d90c5c937794a6dd0dde7190052`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12060 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `474e597e27b83601bc612d7874e8f0187fc3b8f2b0534c4aaa350c3d85e98df6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4993 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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