PDF malware analysis — malicious · b934767eb9cb59b9

MALICIOUS

PDF

11.6 KB

MD5: a809073969926280909270e43abac0e6 SHA-1: fac6c4777d9100fccbee864615086fd49b789279 SHA-256: b934767eb9cb59b998694c0419dc215d2c56e928d420dd1f54ba05d33ca00acd

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, specifically leveraging the 'collab.collectEmailInfo' function which is associated with CVE-2007-5659. This exploit likely leads to the execution of further stages, indicated by the extracted JavaScript files 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. The primary attack vector appears to be exploiting a known PDF vulnerability to achieve arbitrary 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` `df53d43ae6385efb72dd2dcd351f3bee05fc2ae92648bbfc9953eeda2d8bad77`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11873 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `cd976038c3818f95116fb1b38511ea48efd57fd2dc7acd081487cd006359c6cf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4860 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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