PDF malware analysis — malicious · 3bf3f2860e8dab09

MALICIOUS

PDF

12.5 KB

MD5: b3fa119d19ea8f467dda0fb71ecd461d SHA-1: fc36ea0aa1afda320cff0b5f1b27a3c81eeae58c SHA-256: 3bf3f2860e8dab099aa8fbc8016cf6b9e175bdf5fc31611ddb215ba89e6f7e3c

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2007-5659, indicating an exploit attempt. The extracted JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', are likely responsible for executing the exploit and potentially downloading further malicious content. ClamAV also detected this as 'Pdf.Exploit.Agent-36062'. The attack pattern involves leveraging a known PDF vulnerability to achieve arbitrary code execution.

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` `07b43ab3bbbce7bfb680b37b75fbaf3a55be1fa21dd2c63fc2707fcedca056a1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12296 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `b3e74cd2173b76491d118fde812d01bda04463aa6dee35ef8fd42a09ce54171e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5068 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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