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Hackers Deploy Casbaneiro Banking Trojan That Activates When Victims Open Bank Websites
Fortinet details Casbaneiro banking Trojan campaign hitting Latin American bank customers via invoice-themed PDF phishing, with AutoIt loading, RegSvcs.exe injection, and bank-site-triggered activation.
Fortinet identified an August 2026 Casbaneiro banking Trojan campaign targeting users in Argentina, Peru, Colombia, and Mexico through phishing PDFs styled as urgent invoices or legal notices. The staged chain uses IP-based geo-filtering, a Base64-encoded ZIP, an HTA file, and a legitimate AutoIt interpreter before injecting into RegSvcs.exe or mobsync.exe and persisting via a Startup shortcut. The Trojan exfiltrates address book and Outlook data unencrypted, stays dormant until victims visit targeted bank sites, then accepts commands for keyboard control, clipboard pasting, file execution, and command execution. It uses an expected HTTP 403 response from a second server and malformed HTTP requests to complicate network analysis.
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Bisonal Malware Used in Attacks Against Russia and South Korea
Unit 42 details a Bisonal malware variant, active since 2014, targeting Russian and South Korean defense organizations via PDF-disguised spearphishing emails.
In early May, Unit 42 discovered a campaign delivering a Bisonal malware variant against at least one Russian communications security and cryptography company and one unidentified organization in South Korea. The variant, in the wild since at least 2014, introduces a new C2 cipher and rewritten networking and persistence code, with only 14 samples collected to date. Attackers spoofed Russian state corporation Rostec in spearphishing emails carrying an executable disguised with a PDF icon; the dropper decrypts an RC4-encrypted DLL and establishes persistence via a registry Run key. Bisonal has been used since 2013 against government, military, and defense targets in South Korea, Russia, Japan, and India, alongside successors Bioazih and Dexbia.
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ZDI-26-612: (0Day) pdfforge PDF Architect PDF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
ZDI published ZDI-26-612, an unpatched out-of-bounds write in pdfforge PDF Architect PDF parsing enabling remote code execution (CVSS 7.8).
The Zero Day Initiative disclosed ZDI-26-612, an out-of-bounds write vulnerability in pdfforge PDF Architect's PDF file parsing. Successful exploitation allows remote code execution on affected installations. User interaction is required, as the target must visit a malicious page or open a malicious file; ZDI assigned a CVSS score of 7.8 and lists the flaw as a 0day.
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ZDI-26-614: (0Day) pdfforge PDF Architect PDF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
ZDI published ZDI-26-614, another unpatched out-of-bounds write in pdfforge PDF Architect PDF parsing enabling remote code execution (CVSS 7.8).
The Zero Day Initiative published ZDI-26-614, a second out-of-bounds write vulnerability in pdfforge PDF Architect's PDF file parsing. Attackers can execute arbitrary code on affected installations, provided the user visits a malicious page or opens a malicious file. The flaw carries a ZDI-assigned CVSS score of 7.8 and remains unpatched (0day).
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ZDI-26-613: (0Day) pdfforge PDF Architect PDF File Parsing Memory Corruption Remote Code Execution Vulnerability
ZDI published ZDI-26-613, an unpatched memory corruption flaw in pdfforge PDF Architect PDF parsing enabling remote code execution (CVSS 7.8).
The Zero Day Initiative disclosed ZDI-26-613, a memory corruption vulnerability in pdfforge PDF Architect's PDF file parsing that allows remote code execution on affected installations. User interaction is required, meaning the target must visit a malicious page or open a malicious file. ZDI assigned a CVSS score of 7.8 and classifies the issue as a 0day.
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ZDI-26-596: Foxit PDF Reader PDF File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability
Foxit PDF Reader out-of-bounds read in PDF parsing (CVE-2026-57253, CVSS 3.3) can leak sensitive information via malicious files.
ZDI-26-596 covers an out-of-bounds read in Foxit PDF Reader's PDF file parsing, tracked as CVE-2026-57253 and rated CVSS 3.3. Successful exploitation allows remote attackers to disclose sensitive information and requires the target to open a malicious file or page. The advisory was published by the Zero Day Initiative on August 24, 2026.
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