Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f0b6b49a2aeb87…

MALICIOUS

PDF

49.0 KB Created: 2021-05-16 22:01:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fe448eff8d7baa5eae5c7fa7fe5f0602 SHA-1: f2eaf0d405c99745c0d025cc06165cad78221db3 SHA-256: d8f0b6b49a2aeb87f24fe1ab0bb849bae0b6b44f132ec10efdd6f7940e747c66
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 advertising methods to obtain free Robux or Coin Master spins. The ML classifier also flagged this PDF as malicious. The presence of these links suggests the document is designed to trick users into visiting potentially harmful websites or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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://androidthai.in.th/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/spin-link_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://androidthai.in.th/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA9 25800 bytes
SHA-256: f151aedb43ae465213e74149a3b402f9e9f4dfcfde76244bc122ff9230ce3ede
font_01_sfnt_off000087d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D5 7436 bytes
SHA-256: 4a13d5d8cb047d0703728abd56fadd7857e02dd2d0bdc744bf23c6d558594edd
font_02_sfnt_off000099d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D6 19316 bytes
SHA-256: 0830f2bc2b032c7ad37be74462a8461862374830fa053aba1852b18e492c5f08

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