Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9f7d7925491a3e…

MALICIOUS

PDF

46.7 KB Created: 2021-05-12 01:12:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fe08f31c4851553a2ca83131d746cd22 SHA-1: f02e35b06d39cb46940760d14465f94b2c940782 SHA-256: 9d9f7d7925491a3e36982da189af22f76d2859368688922bcbe14cb995c078ce
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 0.8948

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/431946152/get-free-robux-info-game-hack PDF link annotation
    • https://fib.ub.ac.id/sac/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-acc_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/2021-free-spins-coin-master_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
font_00_sfnt_off00004980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4980 27288 bytes
SHA-256: c97a464d760d23871a7caed1170187da2cc1547ea38e2a064a8317567819748a
font_01_sfnt_off00008796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8796 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000094a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94A8 18120 bytes
SHA-256: 6e6e8bb7c0e640fc67837f70826b1bbd381eb05acf75ec047415621944091573

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