Malicious PDF — malware analysis report

Static analysis result for SHA-256 773188058b489e99…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 13:25:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 830f593da040845e625a281ce1044a77 SHA-1: 15676c4390405c71964fba0ccc78f9fac4d0ab6b SHA-256: 773188058b489e998448523bef29b96da07441a939df1d1bdfd57e929fc5bfa5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a primary lure related to 'Coin Master Free Spin' and game hacks. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' indicates that the document links to a redirector for such lures. The primary IOC is the URL 'https://netcdn.online/app/406889139/coin-master-free-spin-realme-products-game-hack', which likely leads to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt, potentially leveraging embedded JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/coin-master-free-spin-realme-products-game-hack PDF link annotation
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-spins-and-coins-coin-master_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_004_off000052aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AA 30068 bytes
SHA-256: 10d4193e903f107120cabb8079b6d589670753d84a8068e2c5491593b808c95d
font_01_sfnt_off00009046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9046 18688 bytes
SHA-256: 2b96984a12e9234f7a54c21b84caea4c40bc9a6928fd3166a16ecb8c3482d419

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