PDF malware analysis — malicious · 3c5f2ea83a3671ef

MALICIOUS

PDF

12.3 KB

MD5: b4513a3a2c50080646d31da73907ac38 SHA-1: c6e8393c7fca9e804db1cf4070163442582f18f8 SHA-256: 3c5f2ea83a3671efe4faa7ca8dd02f069d24bab73cc2cdadaf39d9acfab26813

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious Link/URL

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2007-5659, indicating an exploit attempt. The ClamAV detection 'Pdf.Exploit.Agent-36062' further confirms its malicious nature. The embedded JavaScript streams, deobfuscated into 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', suggest the execution of a multi-stage payload. The exact functionality of the JavaScript is not fully discernible due to obfuscation, but the exploit and embedded scripts point towards a downloader or dropper.

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `54e4e0b0a5f59f82975aa1870d25921171391b8cb04d8418362451bf6afcdc20`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11958 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `004f5c6ada7fe98aefb4b3363e96741d345b7ecc683e63bb652c4b5382e453ce`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4919 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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