PDF malware analysis — malicious · c6b1ef528dc843f8

MALICIOUS

PDF

11.6 KB

MD5: 14c909218e77071488ddb6e90149e147 SHA-1: 4e7b4d4e52579c9f4678d44a5283c8940bf9df9c SHA-256: c6b1ef528dc843f8ef86948668431ac56ad4226c94316114dd8ffe91d30e6e92

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. Specifically, the CVE_2007_5659 rule indicates the use of a known exploit targeting the Collab.collectEmailInfo function to execute JavaScript. The extracted files legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js are deobfuscated JavaScript, suggesting they are part of the exploit chain. The ClamAV detection further confirms its malicious nature. The overall attack pattern is consistent with a PDF exploit dropper designed to download and execute further malicious content.

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` `68680d85ff5bb8fd1d236a795e5e97fde56138ca9c7ab24e519fbd2b6a56bfe7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11877 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `5df154da5742d39a6de72c69a9528a011ccb35efc94c7068c5cda4e0e15b83fd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4862 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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