PDF malware analysis — malicious · c1f33495f07f3090

MALICIOUS

PDF

12.7 KB

MD5: cbee4eb16cbb93bfd4f001d7af040859 SHA-1: f0233c813d35b217b8c318a7192c2bc14dbc0bab SHA-256: c1f33495f07f30900bdda264db76f3902450624499dcda1e3e40a69f612e71a6

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, which is triggered by the CVE-2007-5659 exploit. This exploit leverages the Collab.collectEmailInfo function to execute obfuscated JavaScript. The presence of deobfuscated JavaScript files (legacy_pdfkit_stage_000.js, legacy_pdfkit_stage_001.js) indicates a multi-stage attack designed to download and execute further payloads. ClamAV also detected this as Pdf.Exploit.Agent-36062.

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` `18a38b7c603c13dc3d42ee090c7de548ed343fbf49ef3adb63ff3ba50e869810`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12314 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a1bd0363379db97c71bc8394741fc538ad640e87536ee2a307195feb25fa25c3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5123 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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