Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf72ba463ff134f4…

MALICIOUS

PDF

43.7 KB Created: 2021-05-20 00:04:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 459511fd74218d5dbac6f571c62de71a SHA-1: 538e8e799e25aa44e551a832d50fec134a78c1da SHA-256: bf72ba463ff134f40fd773c3dcf14d0ea90dcfc65c5d2530c786aba6b3ec8f67
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 0.9969

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.xyz/app/835599320/free-youtube-tiktok-game-hack PDF link annotation
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/what-is-wurst_GM479516143.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_off00004a7b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7B 27952 bytes
SHA-256: f5f26ca652a618e2904b7ea080af610e73456996f08ac9a87e198dc71f80f660
font_01_sfnt_off00008985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8985 17916 bytes
SHA-256: 6171dc33effd622977a10c77a6c3003b305f708fb97d4ec75e81d13a5f235df5

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