PDF malware analysis — malicious · 4fb8d6d5070ab7ee

MALICIOUS

PDF

12.4 KB

MD5: 2abdf0c3ad3a767d82f5deaa984cf6b6 SHA-1: 2fdc5d73ebda1cdcba09dda5c779f906af21bbe3 SHA-256: 4fb8d6d5070ab7ee853b257d80dcde25657ca03909a109ba73ff49624ff9a69d

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, as indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The 'CVE_2007_5659' heuristic specifically points to the use of a known exploit technique involving the 'Collab.collectEmailInfo' method to execute JavaScript. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') suggests that the script is designed to perform further malicious actions, such as downloading and executing a second-stage payload. The ClamAV detection further confirms the malicious nature of the file.

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` `2c0fabbd69cef109328a62308a517078b49f519fa2b54f1012d8fbf8774008eb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12656 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c4e2686467b4859ac1f5c301f97270be393c8b136685571145f18a1e98d3c0d9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5268 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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