PDF malware analysis — malicious · b2466086512ed490

MALICIOUS

PDF

12.0 KB

MD5: 393afbe8e275bf7e4ff2f0dc2b353a86 SHA-1: 680b0db0deaa1f520f0f0fd2839d0499ee16d1e5 SHA-256: b2466086512ed490ad85cb42b0c6d175cb8ce9a3137617da63d11f1b4e57e505

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link

The file is a PDF containing embedded JavaScript, which is known to be used for exploiting vulnerabilities. Specifically, the CVE-2007-5659 heuristic indicates the use of a known exploit targeting Adobe Reader. The embedded JavaScript streams, particularly 'legacy_pdfkit_stage_000.js', are heavily obfuscated but suggest the execution of further malicious code. The primary attack vector appears to be leveraging the 'Collab.collectEmailInfo' method to achieve arbitrary JavaScript execution.

Heuristics 6

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-36079 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36079
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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` `ef8bdac794684ae9cd4eb7091d80e1c5ca478c06c639d72d01626c1f7ce78b6d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	578 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `d43e69f38301e930fa6560c22e347bb9ca12a6a09efa50f24b46424d9e70a570`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12491 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `1a851a7eec2a5327a93a7d04fbf68edf4f5c7cc635a1289f029b0d5948f00686`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5127 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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