PDF malware analysis — malicious · fcb37b06291a228e

MALICIOUS

PDF

11.8 KB

MD5: bf7768925ee0382eac77d6cf542a92b0 SHA-1: f9fafc7d4ed3f3d785798031d51631c9212a4290 SHA-256: fcb37b06291a228e2cd6a2ca20d569212afbf7e1685c117c2dc4333c380f47cf

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/URL

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. Specifically, the 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 second-stage payload, as suggested by the suspicious extracted JavaScript files. The ClamAV detection further confirms its malicious nature.

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` `94c659d2cc5bac8afd533c4a2a04c368064cf5814af1734eba08454270f2e28e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12176 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `90121a291da4aebd6e73c40959f4f109aa25bfb3231f2539eb8e4de5018f3c1e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5027 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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