PDF malware analysis — malicious · 22cd0b226d38e75d

MALICIOUS

PDF

11.6 KB

MD5: d54f9447bce4b0f370db3a9f60b07fa7 SHA-1: 976e70bd5ac31ce063812c03c50ac6c560bcc052 SHA-256: 22cd0b226d38e75d60d4c2a50ca069870f8c5696f85f2a01fddf08e3d4ac2b3e

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 including a critical alert for CVE-2007-5659 related to the 'Collab.collectEmailInfo' function. This function is known to be used in PDF exploits to execute arbitrary JavaScript. The extracted JavaScript streams, '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 malicious JavaScript, likely to download and execute further stages of malware.

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` `3c9776a0ccbca5a27e74f530c97e674e1b7d8594cec3ff1ea8b3ed2985791486`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11897 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `94c4692320bd6eff8a91fcf1a2f9744af131e29a2e1c67b9a4d6cdc2816e3de7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4875 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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