Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ee23b54593601f…

MALICIOUS

PDF

43.4 KB Created: 2021-05-14 21:33:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8282f5b8c5ab340079a0b7a365f71d89 SHA-1: 298b38874940696d5ff5d1904dcb0f9b0dd99823 SHA-256: a2ee23b54593601f66981e13141f83ada78f96e4c313e54ce439ff4fd6218f98
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically targeting users with lures related to game accounts like Roblox. The ML classifier also flagged this PDF with high confidence. The presence of a visual download button further supports the malicious intent of directing users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/how-to-hack-someone In PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/roblox-verification_GM431946152.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/free-coins_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/minecraft_GM479516143.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c5d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C5D 24620 bytes
SHA-256: cd9d1e400a5d2c93a4c611234a7fb10c03b020e290c6b9aa3ed5c8534fe388b6
font_01_sfnt_off00008424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8424 19316 bytes
SHA-256: 0830f2bc2b032c7ad37be74462a8461862374830fa053aba1852b18e492c5f08

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