Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7908949f21ce2db…

MALICIOUS

PDF

43.1 KB Created: 2021-05-17 23:46:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4e04c023209ca5430367f4af9040832e SHA-1: c4aa4bae124b48f77aa8248404a415ccf9445b70 SHA-256: b7908949f21ce2dbe6e23aec6a7ca0d6c88aa3a237f1adee94fcd2dab0293b4b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "free generators" for games. The primary lure URL is https://netcdn.xyz/app/406889139/how-to-get-free-coins-for-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector designed to entice users to click through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/how-to-get-free-coins-for-coin-master-game-hack In PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/getrobux-now_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/coin-master-villages_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/coin-master-fan_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_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_003_off00004cfd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CFD 25680 bytes
SHA-256: 5eb8f2811f40850dd484fbee9b55b1984dc01bd5d33faefc9db2c3b9b385646c
font_01_sfnt_off00008757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8757 17872 bytes
SHA-256: 8c0da9336e983259e7b63ac0942506965b31c2e675ac4d9d442a950891c70db8

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