PDF malware analysis — malicious · b302b734a24cb619

MALICIOUS

PDF

11.3 KB

MD5: ef63afb45fce6f81f84a3b73b005975c SHA-1: 3c995ec258e646dc2e482fb342a9d5ec49107612 SHA-256: b302b734a24cb619131cd65dd379880dd5d2eec67312fa265aaddd9f4d9f1307

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF containing embedded JavaScript, identified by heuristics as exploiting CVE-2007-5659. The JavaScript is heavily obfuscated but appears to be designed to download and execute a second-stage payload. ClamAV also detected this file as Pdf.Exploit.Agent-36079, further confirming its malicious nature. The primary attack vector is the exploitation of a PDF viewer vulnerability.

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` `335871b6c46f7ef3fd4a810348544f78912c7ad86528f06c343ac39de145e067`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12005 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `2cdcc4905095b413edf47ce533e408d83664a0ddff35cd6dd6a32285b3a61287`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	4874 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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