PDF malware analysis — malicious · f688679392607b45

MALICIOUS

PDF

12.3 KB

MD5: ff8fcf6716323a5c37ebd9ea28a18d61 SHA-1: 29254938979acb45234d46df5a6b1a7b37c36346 SHA-256: f688679392607b45f267deac9619666df71587b58593cddbd284d419a3848e55

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The critical CVE-2007-5659 heuristic indicates the use of a known exploit targeting the Collab.collectEmailInfo function to execute JavaScript. This script is likely designed to download and execute a secondary payload, as suggested by the extracted JavaScript files and the ClamAV detection signature 'Pdf.Exploit.Agent-36065'.

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` `add145c7c96df0ac6f21e460b44204ca9f0412df1f3535b0343601aa55fe66d5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12560 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `be3addbaec11b049353242deb320b0078f5550dfdb461dc981bd2aa0435bb083`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5199 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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