PDF malware analysis — malicious · 55c4e59fc6242f09

MALICIOUS

PDF

12.3 KB

MD5: bb1608e1c1241ed93fd3d60170b8f0e9 SHA-1: 009aeee4aaf2ed931575e9035d2a4c053148340a SHA-256: 55c4e59fc6242f09ece528df789d225452b59c3234caa8b50e841af449ed2d47

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2007_5659' firing suggests exploitation of a known PDF vulnerability using JavaScript. The file was detected by ClamAV as 'Pdf.Exploit.Agent-36065'. The embedded JavaScript, found in 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', is likely responsible for downloading and executing a second-stage 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-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` `d01c8c30a5044bed473a2b7bfc00d9944f7f2537e0b743f621ac2e86be8d80df`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12588 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `853fdbdb1e294f2c2b1dc28db9c82a2a5c3b810723c59cd03ab86ed7481221bf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5228 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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