PDF malware analysis — malicious · 3fa5255652dfe717

MALICIOUS

PDF

11.6 KB

MD5: 9d991cd9d86cf36f3b81b13682c8d01e SHA-1: f8dc4de15f20bc1559937b2099f186bb3179ffb7 SHA-256: 3fa5255652dfe717b7935104946617ca880c4c1698d30bf911e577e2c12d9daa

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 a PDF JavaScript exploit. The deobfuscated JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, indicate the presence of malicious scripting. The primary function of the script appears to be the execution of further malicious code, likely a downloader for a second-stage payload, as suggested by the ClamAV detection and the nature of the exploit.

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` `15dd3193860ca35791f4accda1493443d2e434795ff50d0161afcb5be3d60f8a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11925 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `38d49bf9296c86ae48feb2157fd933d1c430b78c015cbf9914fa2db63b115e2d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4862 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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