PDF malware analysis — malicious · c0b6bded4ef4234e

MALICIOUS

PDF

12.4 KB

MD5: a18ebf1f96fc1abdb3c43646d22e2f8b SHA-1: a2f6c58a75f0ccc620b84a076b75f7fc6de8d758 SHA-256: c0b6bded4ef4234e3ccb1cc8aae44807830bde8593d93102620df109e51db522

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script Execution T1204.002 Malicious File Execution: User Execution: Malicious File

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 using the Collab.collectEmailInfo method. The heuristics indicate that this JavaScript is deobfuscated and likely responsible for downloading and executing 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` `aeac6900d188dec67216a700e1c5961058c21dc09552e9eed23574d12f1d8774`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12037 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `1e231b19b52188d0d0fb6942126f25d9b315992273d259e9aa049a6557f0418e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4959 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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