PDF malware analysis — malicious · f13ea7c0e2d381a4

MALICIOUS

PDF

11.9 KB

MD5: 20300659bb5b4927225650ff2709268b SHA-1: 45efb1f4062fa45a0ba5ddbf8a90184de9e68d46 SHA-256: f13ea7c0e2d381a4a271113b7df9e82e427d4d1ab88cc9ea446e14992f85be94

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified by multiple heuristics including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical heuristic 'CVE_2007_5659' indicates the use of a known exploit targeting the 'collab.collectEmailInfo' function, which is used to execute JavaScript. The deobfuscated JavaScript files suggest the execution of a malicious script, likely for downloading and executing a secondary payload. The ClamAV detection further confirms its malicious nature.

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` `30b2608a5d62d7ecd21a8ca3e56d010832175ba9926c9876e4da4145267fe544`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12201 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `e8fa6a70bc08e583468a692668cee9e575c2d2901f4554d7a2890bef47ed493b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5009 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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