Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ddec2b98dbb32c…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 13:33:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2825c84341b3c8f2e7960a5a66bc6924 SHA-1: 754cc77d7cdb8fcae612635a608728284137839a SHA-256: 54ddec2b98dbb32cd67636ed1a93b28ec4a8aacfcb9760148fbae0ed26849fb9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting "game hacks" and "free Robux" lures. The primary malicious URL identified is https://netcdn.online/app/406889139/coin-master-facebook-hack-game-hack. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-facebook-hack-game-hack In PDF document text
    • http://perpus.stfm.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-roblox-to-play-online_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-robux-hack-2021_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_004_off000052f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F2 24412 bytes
SHA-256: e76679b769ffdd91b0f95b295927d5ec964bc6778d27f631826cc973c9e925ac
font_01_sfnt_off00008a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A94 18040 bytes
SHA-256: 061f1859a06f64f15b62312cec33f4d1ae20d2ec323f296e754baff4e0335bc5

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