PDF malware analysis — malicious · 4bf31519f5d4f622

MALICIOUS

PDF

12.6 KB

MD5: 14a2fc88a3c838428aed6efcab830ede SHA-1: eb3fe85add580a04fee7f744ca4d24e7607308ab SHA-256: 4bf31519f5d4f6229b542e01e52893a0b95216406327fdecad4906abd4373dcb

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, flagged by multiple heuristics as malicious and indicative of exploit activity (CVE-2007-5659). The ClamAV detection 'Pdf.Exploit.Agent-36062' further supports this. The extracted JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', suggest a multi-stage exploit process. The primary intent appears to be the execution of arbitrary code via the JavaScript engine, likely to download and execute a secondary payload.

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `009b59f55993ef95b46776afe0f7f57fe3d45b4e26c74dca75bafb47b8995af6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12295 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `41c5c59d065182fbef9b62a2a3cb4ea8de745dbcd9d77d3ae91b5b4c99e56c05`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5061 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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