PDF malware analysis — malicious · f83cb576964f3eb3

MALICIOUS

PDF

12.4 KB

MD5: f83349d872c0a634d9c501f57e134489 SHA-1: b5110084ff8aeb4490183b8d546647176a9cb9bf SHA-256: f83cb576964f3eb326739e31e2c5dbb2b041aad7fbe85f60b0dbb40da620e721

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF file contains embedded JavaScript, identified by the CVE_2007_5659 heuristic, which is designed to exploit a vulnerability in older versions of Adobe Reader. The extracted JavaScript streams, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, suggest a multi-stage process typical of exploit kits. The primary function appears to be the execution of malicious code, likely to download and run a secondary payload. The ClamAV detection further confirms its malicious nature.

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` `5a40a17f579933bf541ff017f47023fbe9f7d28d43448104cf87003577716f00`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12136 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `406791e00af877c5ddc56eef693483c18530d698bda4b7d3488f3c78f97ddc1a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4961 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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