Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c80f237fafb390…

MALICIOUS

PDF

44.2 KB Created: 2021-06-11 01:55:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f60f79aad7bf704cbdaf418309c9d644 SHA-1: 7b9ede700683520c9ae21c01f8378395ec8ae903 SHA-256: c4c80f237fafb390c8a22b6054197b2b4588744587f4b4d528cc3b6ee081bb17
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 0.9865

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.tw/app/431946152/fondo-roblox-hacker-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-for-roblox-project-pokemon_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-hack-may-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-coin-master-for-android_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_off00005094.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5094 25012 bytes
SHA-256: 86261154f5fde01a4c0966062a110da1e4fccdf997539cc60ca7a9c7418a25c7
font_01_sfnt_off00008979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8979 18520 bytes
SHA-256: 05201d6855d693545a7c8eef865023fd889ff77c9e3541033bbb681c39d24c57

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