PDF malware analysis — malicious · e2370e3062e65759

MALICIOUS

PDF

12.1 KB

MD5: bccc02a29e09310795467ebafaa4e4c0 SHA-1: bef7fa37c0cc2964b454f9ca266a54b12fbc3535 SHA-256: e2370e3062e65759fa82433eafffff2ac5f76a52ba01b05089db06d1863d7bb9

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The file is a PDF containing obfuscated JavaScript, identified by multiple heuristics as exploiting CVE-2007-5659 via the Collab.collectEmailInfo method. The embedded JavaScript streams, particularly legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are indicative of a multi-stage exploit chain. The primary function of the JavaScript appears to be downloading and executing further malicious content, a common technique for initial access.

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` `34942740b5f534dee11f5dcbd4ab17ccad58e7d34ef8f24b0a717cdd7f248b34`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12292 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d1deec9c3fec4e22f634737572c29d06a6c50e9bb19715b64c21b88d37ed4beb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5115 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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