PDF malware analysis — malicious · 915c733e5f76715c

MALICIOUS

PDF

12.0 KB

MD5: b37befd2d998233a86cf6b522fb11f7f SHA-1: 371cfbcbebdc39cf4da28abd4961e0b6ddb38466 SHA-256: 915c733e5f76715cd720bdb26ae74c15a86a5dc7cf97f9e0339bcfdeca396946

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 the exploitation of a known vulnerability using JavaScript that is obfuscated and then evaluated. This JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the suspicious extracted artifacts named legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. 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` `9bb1b6919b4db957ca8a3d78f28b92ba8a29ae25286253395cabe16aa3f3b5b5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12294 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `8ad420b21279dd44ed0a1fb80ddc7f838f9d2ecf989254aba2427187197f869e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5129 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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