Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7581d9d7ec77c1e…

MALICIOUS

PDF

35.9 KB Created: 2021-06-29 18:44:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6eb73e64991a77dcb1a9f206a14dd210 SHA-1: 2534fb19cd1fe7952621a75c01b06c3963ed4747 SHA-256: f7581d9d7ec77c1eafc4b3ed08eaf77c6bd9138a896df8eef1e84acfc0637808
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs and a lure related to game hacks and free in-game currency. The primary heuristic indicates a 'game hack redirector' lure, suggesting the document's purpose is to drive users to malicious websites. The ML classifier strongly supports the malicious nature of this PDF.

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/earn-robux-for-free-no-offers-or-human-verification-game-hack PDF link annotation
    • http://sellitafrica.com/media/storage/editor/files/coin-master-today_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-how-to-get-private-server-for-free_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/win-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/robloxcom-free-kkk-k_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-cheat-in-roblox-get-eaten_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-free-ios-no-verification_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_off0000325f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x325F 23104 bytes
SHA-256: 93f69b4b73baa07ed2d6a9ca3d8745d21c1fbd222d1187c49db6c93edd84823e
font_01_sfnt_off00006694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6694 19336 bytes
SHA-256: b375cc2aa8830580ce60dd5b2d74e2ff32ef7cfe6a27e40f930afc3e08932883

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