Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2e24d752a9a4bb…

MALICIOUS

PDF

56.7 KB Created: 2021-06-11 06:58:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 4038d7951a69fa8de73eb08d24496003 SHA-1: ec2476c6e33ce6411acb0110b42e7dfee2b619ac SHA-256: af2e24d752a9a4bbe0d02baccb8345b8d1ddf4063a400947675ed45c6ee34081
140 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9392

Heuristics 4

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/promobilemafia.com-robux-cheats-game-hack.
  • 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.tw/app/431946152/promobilemafia.com-robux-cheats-game-hack In PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/overhaul-roblox-free-shop_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/autofarm-hack-roblox-pjj_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/hack-roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000055e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55E2 33552 bytes
SHA-256: fe46f149c09f3e7d01bd91d86297c7458cc524e0e73b2ecb756deaecdd3d79cf
font_01_sfnt_off0000a266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA266 2836 bytes
SHA-256: fd98c8f6e7c2e74bbd5822409159a93ac5c94da083ae4c2eb269d4284375f9e8
font_02_sfnt_off0000ac07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC07 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000b919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB919 19024 bytes
SHA-256: ad73c4cb9a754c0daeb8c7162266a7386072237cea3812df9e63f1acbca0bf0c

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