PDF malware analysis — malicious · cd3dadd6dc461931

MALICIOUS

PDF

11.5 KB

MD5: e9554c658044fb92624f508c71f4a60e SHA-1: d6cc1486f93123302506e4128a2a26a88588dde2 SHA-256: cd3dadd6dc461931e9d9a557fab2164052b41f0aee9b5821b366fd9fd0f0ca2e

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript that is obfuscated and utilizes String.fromCharCode, indicating malicious intent. The critical heuristic firing for CVE-2007-5659 confirms the exploitation of this known vulnerability. The embedded JavaScript is designed to download and execute a second-stage payload, as suggested by the deobfuscated script content and the ClamAV detection signature 'Pdf.Exploit.Agent-36079'.

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` `215ca6ab747db8b06b601d20f3f42f0cd07c22a56123ac1f82c803069191ec5f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	11878 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `062a9f0f10efbb09d502c0c8e60a9ad3c9c068f7d3a9a5a75c6680bf4d3f9a00`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	4879 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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