PDF malware analysis — malicious · 4322dd8bff92a836

MALICIOUS

PDF

11.8 KB

MD5: 9d67bb930d2d2dc7decae4ea92bfcb9f SHA-1: 449bc03b837a6ca7044fbea4266e92dacd79ae22 SHA-256: 4322dd8bff92a836df5b3cfc1c1eeaf534f2dc26fd5e9c28b4c8ba648bb2a323

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic specifically points to the exploitation of a known vulnerability using JavaScript. The extracted JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, suggest a multi-stage process typical of exploit kits. The primary function of the embedded script appears to be the download and execution of further malicious content, as suggested by the nature of exploit kit stages.

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` `20958ab1fbdca3e7271b1faea8716aff94bb57d0c224b234030dd3b0c940b4bf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11608 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `1501e1515550a4e2473d559624e44c9a58ed66095e0456f830f5184f7cd277ff`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4756 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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