Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad13ed2fa88c4b6…

MALICIOUS

PDF

36.6 KB Created: 2021-07-03 13:41:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 67bdb15e81bd45e89d41fe552cc151d9 SHA-1: c5007456d6801db210dcc0b13436b7ebe827183d SHA-256: bad13ed2fa88c4b69356efa940bfebe5c743660e711841392d0c1264f5894a10
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, masquerading as a game hack or free spins generator. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-free-spins-and-coins-daily-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/coin-master-free-spins-and-coins-daily-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/is-it-safe-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/veil-free-download-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-outrageous-builders-club-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-code-for-call-of-duty-ww2-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-hacks-for-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/viper-venom-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/hack-roblox-chat_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/hacker-roblox-wls2_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/cheat-codes-for-ben-10-universal-showdown-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/robux-hack-no-human-verification-or-offers_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-clothes-on-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-no-verification-no-download_GM431946152.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_off000036f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36F2 23152 bytes
SHA-256: 1a465bb866546bdcf9f4b2f3e4022ef457566d8080cd6def87186eb7da66461a
font_01_sfnt_off00006b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B01 18772 bytes
SHA-256: 19a32b246d97102996ae87c3480bab741072fa74bbecf67b9c68c4bb2203f36d

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