Malicious PDF — malware analysis report

Static analysis result for SHA-256 af28877ac0a5a4af…

MALICIOUS

PDF

44.0 KB Created: 2021-05-11 14:23:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-22
MD5: 120750384cfec3d56a68542d8e33baca SHA-1: bd7f1b33a78e1fa841d8ffeee94334302633623b SHA-256: af28877ac0a5a4affaecd5fa4292f098ecccbfa4caf0b11c20a4b7af923e6127
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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/406889139/how-to-get-more-spins-on-coin-master-for-free-game-hack In PDF document text
    • http://jasperfirstumc.com/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://jasperfirstumc.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://jasperfirstumc.com/images/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/coin-master-map_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/roblox-generator_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://jasperfirstumc.com/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/coin-master-free-spins-link-2021-ios_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
stream_003_off0000479f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x479F 24580 bytes
SHA-256: dbe59655ad616aaa8401358232e70b8efba2965aa795bfbac3bd304445fac4f9
font_01_sfnt_off00008008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8008 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off000089f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F3 18052 bytes
SHA-256: fa2464eaebfb8d03ead71eceb596d04c94d28f156e1826a2469de3cf6995c318