Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ec9fafe3030ba9…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 11:07:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bc4e29893fb68bf05fd62082bfd023b7 SHA-1: f0f32874a901ce6dc07f1715986edc754d43fe2b SHA-256: 28ec9fafe3030ba9431e914063ceefdae1d91dda7e5a31ef8f3ba5ba3c1a08b3
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 0.9797

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.online/app/431946152/robux-gainer-game-hack PDF link annotation
    • https://elibrary.ikhac.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-free-event-items_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-are-scams_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-executor-free_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-online_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/earn-free-robux-for-roblox_GM431946152.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_004_off00004e48.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E48 24856 bytes
SHA-256: 7fd19f18b1310cec50628ce5144f1c9a9df1a886aae703ec7bd7f30193e38122
font_01_sfnt_off000087ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CE 2836 bytes
SHA-256: e6aea2daa5db9355830a9a968e1dd4db55accb324ce868326bbb9f42b5e0b8b4
font_02_sfnt_off00009173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9173 18200 bytes
SHA-256: b49f4983386c5e2433966410528fc3ba3932a5551bf841ef6afc48143acf477f

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