PDF malware analysis — malicious · b335e9f962ebcbdd

MALICIOUS

PDF

12.5 KB

MD5: f07e03a876343012117f84a84b6f8a00 SHA-1: c4a6f7b0f7aa408e936219c7acfcad0ffa8b513b SHA-256: b335e9f962ebcbdd5c0adabdcd29f19f2d864407b1ca583a5702ed6c490ba90b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: Malicious Attachment T1059.001 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 using the Collab.collectEmailInfo method. This JavaScript is designed to download and execute a second-stage payload, as indicated by the presence of deobfuscated JavaScript files. The ClamAV detection 'Pdf.Exploit.Agent-36062' 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-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` `e6b5c85f2192c10e59ea02bfdd0e7d6a11b45cd6dbef302aaa323b2b6e416999`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12140 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `44ccb6d21203ed0bdd6154a6eee793b25bca252d538e449c49134addea4f58d4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5054 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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