Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99dd06603c5b575…

MALICIOUS

PDF

42.6 KB Created: 2021-05-14 21:19:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b7abc23c5adbc68fa36e5061a17d73e2 SHA-1: ec34e24b84430cc98565d0d10fac667d69d595ca SHA-256: d99dd06603c5b575adda646a72e350c36f37269d2f6f33fe94408a3796a95ea2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-free-spins-link-no-verification-2021-game-hack PDF link annotation
    • http://empresa-venta.hr/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-apk_GM406889139.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_off00004b17.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B17 24468 bytes
SHA-256: a6a876dc7241460125cabb4950d518cc3d86059448e43718227653e908ac1fdd
font_01_sfnt_off00008332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8332 18592 bytes
SHA-256: f74899e085c91cd53f5ca09b8a5278408f496fc0c0b246b6d10c1aa0f6296d24

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