Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b94a1e8c05fbe7…

MALICIOUS

PDF

47.3 KB Created: 2021-05-16 08:32:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d2ca5303430b290c024df167a55fb4a3 SHA-1: 8be0ffbd2f8f6a52518412fd4822ea755a8cf33d SHA-256: 23b94a1e8c05fbe715d968fd58bf04ec376272ffcd0037d078a7b5c345ef765b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack lure. The document body and extracted URLs reinforce this, pointing to sites offering cheats for games like Coin Master and Robux. While no scripts were explicitly extracted, the nature of the lure suggests it is intended to redirect users to potentially malicious websites or downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/406889139/coin-master-cheats-2021-game-hack PDF link annotation
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c70.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C70 29152 bytes
SHA-256: a424838fff50eacd0f257d978aaf45baa17d7c4ef52aef805fc32f8fca79fab5
font_01_sfnt_off00008d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2F 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off000096cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96CF 18112 bytes
SHA-256: 8fd2be34c5ae6d36bafabdc0d90731bcc2dba590b40522d9b75e2e7b006908cc

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