PDF / .TXT malware analysis — malicious · 3094fadc632f59b7

MALICIOUS

PDF / .TXT

12.8 KB

MD5: 37a6729917b41e0f08b1e35bf81e91f9 SHA-1: 152b8cc8d7c2ff75b89b6d4b845b8a11da1a2996 SHA-256: 3094fadc632f59b77b7271c007773f91895b053586b5ab6fe4c8442f85d8e05b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF exploiting CVE-2007-5659 via embedded JavaScript. The JavaScript streams, identified as legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are heavily obfuscated but indicate a downloader pattern. ClamAV also detected this as Pdf.Exploit.Agent-36064, reinforcing the 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-36064 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36064
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` `a5c8f0f722df4dd9876a0087e1eee65bd3020c5995f94f6729f7e17f3f3677a0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	331 bytes
`legacy_pdfkit_stage_000.js` `01e3df3cad45acda3bc0dbe935a70df7dc9d65428139e399b413c21e5c45b282`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	11854 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `404824ad38beeb6e92740d25113b282ef3df0fed3b511bdf14158523c128fd24`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	5010 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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