Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c43f87eccfd034e…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 16:01:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0753639af774c3cfab81d9b457242092 SHA-1: a9ac726b95f1dbfa8ff253e71e4b398f6e97acb8 SHA-256: 0c43f87eccfd034e7bfb376c964b7df16fe8af48fe6f5b86395b855638dd61d9
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-invite-friends-hack-game-hack PDF link annotation
    • http://lc.pustaka.unand.ac.id/repository/robux-cheat_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-infinite-jump-hack-with-pictures_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/more-robux-for-free-no-verification_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/codes-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-how-to-get-free-followers_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/sendspace-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/whats-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-robux-without-human-verification-2021-or-survey_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/cheat-engine-66-roblox_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-coin-master-account_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
font_00_sfnt_off00002f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F76 23068 bytes
SHA-256: ce26d3250454fa7e54f972a9f7bf1b2b351bb7616a2fb3065f87d12608531e6f
font_01_sfnt_off00006347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6347 18456 bytes
SHA-256: a26d5737dc3e5e06b02edf808e6094a365cb44a0ead87865d2f9109774260649

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