PDF malware analysis — malicious · 24b36cc3370c6794

MALICIOUS

PDF

12.2 KB

MD5: 443aa6c026bece9b1b203b8d805f8c7e SHA-1: 43afa94556e71b2842d9aa51f4bba2932733df5e SHA-256: 24b36cc3370c679427867dd4d3b7f93ed4518f9f464fb7e5b6cd6c5319e97d6f

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF document that leverages the CVE-2007-5659 vulnerability through embedded JavaScript. The JavaScript, identified by ClamAV as Pdf.Exploit.Agent-36079, is designed to collect email information and likely serves as a dropper for further malicious activity. The obfuscated nature of the JavaScript and the use of String.fromCharCode suggest an attempt to evade detection.

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` `dfed26875f0f1028fb814bdd8c4f2689b79e7c10b6a52e1a768a772cfcdc754f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12720 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `59b61c797ff8f978ee572feb9d5d8a98f4834abc599b05a1ee7f4857a7a1d42b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5273 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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