PDF malware analysis — malicious · 9dc8ca6f10b6ac68

MALICIOUS

PDF

12.6 KB

MD5: c7713cab0c79d7c18315114d37d0d4f7 SHA-1: d8b72400bae3aab8d6e05f5f8523139cb0ec431d SHA-256: 9dc8ca6f10b6ac6875e45c8c5afd11118cb816b2364dcf0a4bedefc6d45e1bb9

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script Execution T1204.002 Malicious Link/URL

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability, specifically targeting the Collab.collectEmailInfo function. This JavaScript is likely designed to download and execute a secondary payload, as indicated by the extraction of multiple JavaScript files. The primary function of this exploit appears to be initial access for further malicious activity.

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` `87c028757ef9d23d95d7f0c9d85a94edb982b36492b93fb3341511271b984f16`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12341 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4387caefc6af142006cab6a37b6c29c50c44fa1c2fe2c2fd6fb0cba507c64365`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5132 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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