PDF malware analysis — malicious · f4fc55b0ba91cbf8

MALICIOUS

PDF

12.1 KB

MD5: 1f7d709bed6ed899c0a3fc6240c53ab6 SHA-1: c9a7bfa742d39892004cdc04012e17e0e5af11ce SHA-256: f4fc55b0ba91cbf8cf80b602307fa8bcd859fcc2160a8e28c4b70769494dac0a

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The 'CVE_2007_5659' heuristic specifically points to the use of 'Collab.collectEmailInfo' to execute JavaScript, which is a known method for exploiting PDF vulnerabilities. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') further confirms the execution of malicious scripts. The ClamAV detection ('Pdf.Exploit.Agent-36065') strongly suggests this is a malicious PDF 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` `b5650a3b1fe4b8474f25ace7e341950999d3e4a80cee20bf4e934feddd3c1e56`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12449 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4dc5074b3eb068137a203bba418f46130eae728a11f776cb3259a365166aae59`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5150 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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