PDF malware analysis — malicious · 50da4278f1038827

MALICIOUS

PDF

12.7 KB

MD5: f32b76c911e79091c0e67cc54457bd68 SHA-1: aa40b0c296120333c880d917ec7373e07460f910 SHA-256: 50da4278f10388276e499ef85f3c8d43223d079cfc77a6a957314b8d46d65809

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 exploitation of a known PDF vulnerability using the Collab.collectEmailInfo method to execute JavaScript. This JavaScript is further processed into two deobfuscated files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, suggesting a multi-stage exploit. The ClamAV detection 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-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` `9d10b858cb3ae92c7dee05995234e1c638537fa583e5e873a1f91dd028145d74`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12407 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `1959181d672a5d1990b5d18229caeb920a74c920cdc34cf38c2d107ae1b7f1f0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5172 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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