PDF malware analysis — malicious · 95b8a19d52654f5e

MALICIOUS

PDF

12.9 KB

MD5: 38403673c65f5c27e7c27b9367ce878e SHA-1: 8b26264e5cec87ac01720679be52cec4a6b8b30f SHA-256: 95b8a19d52654f5e493ebbbb94ba95555543fa3a8c44896780c4083dd5f70415

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits CVE-2007-5659, specifically using the Collab.collectEmailInfo method. The heuristics indicate that this JavaScript is deobfuscated and likely intended to download and execute a secondary payload, as suggested by the presence of 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. 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` `2d22ea83a21f657b0b7113246541406c2febfd64822abe1b5c0cdc81b981b600`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12523 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `0a021ae33504dfcf2e9fa36f502f6d878ea7e7d74746a2bf1fdb2e7348f0b780`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5221 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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