Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a65c15f0c5e9f7…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 07:47:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 09ba08fc53def6e7fb05b8796185b22a SHA-1: bf158017239ef680d50ac77e21f615b83bac9bde SHA-256: 74a65c15f0c5e9f79cbc22dbb3d588f27fa1dd082861fe8c41cf799d0cd5cf12
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it links to a 'free generator / game hack' lure, specifically pointing to a URL that promises daily coin master free game hacks. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf. The primary malicious indicator is the redirection to a potentially harmful website disguised as a game hack generator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/406889139/daily-coin-master-free-game-hack PDF link annotation
    • http://sellitafrica.com/media/storage/editor/files/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-youtube_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_004_off00004e94.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E94 24944 bytes
SHA-256: 47e2a38a5e3e79d4f43d93ab4939f937519ea75fa75eacf3dc832cb9a1677c13
font_01_sfnt_off000086b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B3 18132 bytes
SHA-256: f675a037fef76fd82d09f8680fbeb6a72eeb7684feda5ffd824d9b16b19a33e7

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