Malicious PDF — malware analysis report

Static analysis result for SHA-256 4278e6eee626f31f…

MALICIOUS

PDF

34.3 KB Created: 2021-06-22 00:10:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ed73d18cb2e17176769eb77370441dad SHA-1: 0d354b71482854b9a23f4670e99df617fbbdec27 SHA-256: 4278e6eee626f31f4861731e4b66e8bb51e83cdd86932ec54ee71df4e5d7e2b4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure of game hacks and free currency to entice users. It contains an embedded URI pointing to 'http://netcdn.co/app/431946152/robux-redeem-game-hack', which is likely a redirector to a phishing site or a download for a secondary payload. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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.co/app/431946152/robux-redeem-game-hack PDF link annotation
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/pokemon-go-free-bot_GM1094591345.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-download_GM406889139.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-spins_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_off00002fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAB 22224 bytes
SHA-256: 917151063e8d62e75ca9c470b080f635d46ad8bb81ff9aacb1e66d0966687bdb
font_01_sfnt_off000060ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FF 18984 bytes
SHA-256: d97083dd0ff79cdf9c544af284e310f7345cbe5b94b26a1243e2f00db67baf22

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