PDF malware analysis — malicious · 3f2c6521ef77b7a6

MALICIOUS

PDF

11.8 KB

MD5: f8ef104a33722972c6134c2aabee8cd6 SHA-1: 69f02292ea5a452eca82e31771440fdf0bed29fc SHA-256: 3f2c6521ef77b7a60eb623574045606b855f886d0ac10c87451b331ddba118b1

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2007_5659 heuristic indicates the use of a known vulnerability involving the 'collab.collectEmailInfo' function to execute JavaScript. This script is likely designed to download and execute a secondary payload, as suggested by the suspicious extracted JavaScript files and the overall malicious verdict. The exact nature of the payload cannot be determined from the provided evidence.

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` `26bc5b5558182c454ff7643603f6e26a64c3b83fc972773e7c4533e6d96cc69a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12052 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `9b91df60b2a3058f89ec03bf1d54512facf08a09bca97d776f16380d2b1f5532`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5003 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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