Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f28da383077fce…

MALICIOUS

PDF

47.2 KB Created: 2021-06-04 02:29:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c0751c47f3820c7995d8fa9363f9ac4b SHA-1: 738eb732315d84e9007c9ab41f5b63920160a985 SHA-256: b0f28da383077fce58eb7a01d8a83a42a4bc5e92ae80a10839a9bcdb832a2b9d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/free-spins-and-coins-coin-master-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/pubg-uc-hilesi_GM1330123889.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-often-pubg-uc-benefits-paid_GM1330123889.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-hack-in-other-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E3 25340 bytes
SHA-256: 22cc043cff31d1fdd352100466b71ddc9e6b517848982f0c6de03852ea232437
font_01_sfnt_off00008cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD7 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9689 18060 bytes
SHA-256: d4954d2d00bde9f6a1061857a61d2c62c1ae360f44744af150ee923481526d51

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