Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90375ffa8e4f980…

MALICIOUS

PDF

34.7 KB Created: 2021-06-20 04:13:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 98c319794bab39bee994983e01c5dddb SHA-1: 0a9ac81b1a200d0497a7172533245bb51d3b667d SHA-256: d90375ffa8e4f9809ae53ee7db65641597d71e30da99fafff40d8085ca4bf823
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary link pointing to a 'free generator / game hack' lure. This suggests the document is designed to trick users into visiting malicious sites, likely for malware distribution or credential harvesting. The ML classifier strongly supports the malicious verdict.

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/roblox-palace-free-robux-game-hack PDF link annotation
    • https://pustaka.widyakartika.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/wahoo-com-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-for-no-money_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/new-code-elemental-wars-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-cb-r-hack-menu_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/play-games-for-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-cheat-exploiter_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/tower-battles-hack-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-hack-autohotkey-roblox-piano-player_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/everest-roleplay-hack-roblox_GM431946152.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_off000030c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C4 22580 bytes
SHA-256: 295862d91c23a2f23e8cc46e1d1bca81d3c3a18012ad2c1cd8e27cce8e0b6ff0
font_01_sfnt_off0000631b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631B 18944 bytes
SHA-256: 1e08bfee9eb2b8e85725601d7285b0e9f2e2df5b5cf77fb1c3571a930a030cc3

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