Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ac9047f8e1364a3…

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 22:13:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 43f78591288fc7987b3fcaee864e1c7f SHA-1: 4b5968ca9c205a84e087f46169060250d238769a SHA-256: 3ac9047f8e1364a3058fcccab4de8bbb2df22ac06b802a2a609fb70002b053e4
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 0.9832

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/479516143/windows-10-minecraft-hacks-game-hack PDF link annotation
    • https://elibrary.sttar.ac.id/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-free-spin-and-coins-links_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_004_off00005215.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5215 30260 bytes
SHA-256: c86c5808a9aac59159f12d4078aeadb2405a74963d5a1dd005635fba40c504b5
font_01_sfnt_off0000950a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x950A 18696 bytes
SHA-256: 404a6a828e36ead2d4cd56abe684579086ad140455fa529c5546af7349081cf7

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