Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb1bfe65d150687…

MALICIOUS

PDF

34.5 KB Created: 2021-06-21 05:28:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 780313de4aa7dc89b458035894cf36d3 SHA-1: aa35932254943d4bce4893f500a81f707330839d SHA-256: 3cb1bfe65d15068746a69bd3cf3a50fad03c87ffab6304785e1d210be21868fc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including a primary one to 'netcdn.co', which is flagged as a game hack redirector. The document body and extracted URLs strongly suggest a lure for free game currency or hacks, a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-toy-codes-roblox-game-hack PDF link annotation
    • http://sellitafrica.com/media/storage/editor/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/pubg-uc-purchase_GM1330123889.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/wurst-commands_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/instant-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/download-roblox-free-windows-7_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-obby-free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-printable-minecraft-coloring-pages_GM479516143.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
font_00_sfnt_off00002f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8A 22564 bytes
SHA-256: 9afa14e5a7dfb19f21364d351d18c4c187192a24b6bf0dd52690b441508f6699
font_01_sfnt_off000061d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D6 19004 bytes
SHA-256: 74d2fee4d395091ea214bff16cfe1347d1e662a9db67cc4456d0d9b978119ab8

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