PDF malware analysis — malicious · 90586053f995b82f

MALICIOUS

PDF

11.8 KB

MD5: 2b452b857c6513d5da33dcb899a0f2be SHA-1: 6763f5e2b3e225a608a92802ab530ce147c2a28c SHA-256: 90586053f995b82fa2591d08daef4420a12ce6fe64d36b1d384a221edf0c1ebc

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV (Pdf.Exploit.Agent-36065). Heuristics indicate exploitation of CVE-2007-5659 via JavaScript, which is likely used to download and execute further stages. The deobfuscated JavaScript files 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' were extracted, suggesting a multi-stage attack. The document body is unreadable, but the presence of exploit code and embedded scripts strongly indicates a malicious intent to compromise the user's system.

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-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `d61022a2cd7511518b5c254b6240a00315afb5f5825a0923de2af19108610e87`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12128 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `64a1f69a562a2d2bdc816522e56a2ba286ffdd8b3214b4c6bd5db247dda25678`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5005 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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