Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e488c0439d4579…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 00:34:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 02089ebdc6e8688962b6757474069b04 SHA-1: 73dad190d0075578bce4d931abf79be31d792ea7 SHA-256: 21e488c0439d4579e9457db3ba59eb38f3f36213b334082e0bedcd9e348652e8
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-hack-online-generator-without-human-verification-game-hack PDF link annotation
    • http://perpus.stikesphi.ac.id/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-do-i-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/gratis-und-sicher-free-robux-bekommen-hacking_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-robux-on-roblox-on-ipod_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-tix-bc-co-cc_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-driveblox-unlimited-money-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/pokemon-go-free-kanto-ticket_GM1094591345.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_002_off00003060.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3060 23208 bytes
SHA-256: 7033aab2162d643a9e01b8c5c502edc3942929495b12fc6ccfd4d9cf4fd5ae44
font_01_sfnt_off000064cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CF 18976 bytes
SHA-256: ec3f3fd648421e9123bdd39a340db4c5ce6d9db5f301fbf36d4352ad3d20d8aa

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