PDF malware analysis — malicious · c57a9af5987c9b89

MALICIOUS

PDF

12.1 KB

MD5: f8f1760b7327e756f9aec68216438fc5 SHA-1: 5a84fe77d9ca30be55c1d904979a170df131fc46 SHA-256: c57a9af5987c9b8960c85f5f43de814253d82455c8b6199b8536ea2002bcb619

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including CVE-2007-5659, indicating an exploit attempt. The ClamAV detection further confirms its malicious nature. The embedded JavaScript streams, named legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, suggest a multi-stage exploit or payload delivery mechanism. The primary attack vector appears to be leveraging the 'Collab.collectEmailInfo' JavaScript function to trigger the exploit.

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` `c3bda7cd231bef74d05f5328103b2daf65b283895e5be6a4b17c8eeb5ec5635f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11751 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `e8917e8ddfcdb117f46ed634bb11d7e8f665e468961dc08b4b3e18eb5e6a194e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4831 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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