Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c946ca0c0fe0d3…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 19:49:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a4ff33a426e1d4d1281b36519bb3290b SHA-1: d19fa04372f1f2975325dc77b2daded5864160b5 SHA-256: 66c946ca0c0fe0d31d1f44e66515bd29e7de4c056401f3daf4e5f6d12217efc9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing for a 'game hack' redirect lure, indicating a phishing or scam attempt. The document body explicitly mentions 'how to get free coins on Coin Master' and links to external sites, suggesting the primary goal is to redirect users to potentially malicious content or scam pages. No scripts were extracted from this sample.

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.tw/app/406889139/how-to-get-free-coins-on-coin-master-iphone-game-hack PDF link annotation
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-code-for-free-spins_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_002_off00003114.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3114 22696 bytes
SHA-256: 24c56795c6f0ed34496f1e6146c3dedd9796c7de45f811ec784a781c7f49057c
font_01_sfnt_off000063c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C8 18504 bytes
SHA-256: 395fc550c26729eff2306150ae31713d8bd4c4ff218e2b94d4b8ad057d21bb45

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