PDF malware analysis — malicious · c0137e286c896be8

MALICIOUS

PDF

12.0 KB

MD5: 092d050e7ff8a48e119da9ff904a8da7 SHA-1: a5142d9681f646f81a1a70a95ac31ec56eee7958 SHA-256: c0137e286c896be8db2099bb2c0f61828da75225f01ef2d4f7a3ee02ea5f6e7a

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits CVE-2007-5659, as indicated by the 'Collab.collectEmailInfo' heuristic. The deobfuscated JavaScript files 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' suggest a multi-stage download and execution process. The primary intent appears to be the exploitation of a PDF reader vulnerability to deliver a secondary payload.

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` `17f195fb2467c1b8b6d0f2dca5ab9b1858c09845b4137c808eb4378472b54f0a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12263 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `0c23381b9ea3727726ac502584d6d960b6a47f2be798a24380713947523a990f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5070 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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