Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf8bf7e0fb1e8a7…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 18:20:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a51a677aaf1c0a55f0005062217db37c SHA-1: b49aa72712c9d2c0919acba0c41a626b190233a4 SHA-256: adf8bf7e0fb1e8a7ffa7deb482d3aa9f380713365d989db7c1eb4f0ff1798938
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, specifically pointing to a URL designed to lure users with promises of game cheats. The document body, though heavily obfuscated, contains references to 'Spinuri Gratis Coin Master' and the same malicious URL, reinforcing the lure. This suggests the primary goal is to trick users into visiting a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/spinuri-gratis-coin-master-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-script-aimbot-esp-spinbot-counter-blox-roblox-offensive_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/flame-gg-free-robux_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
stream_004_off00004f7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F7D 24824 bytes
SHA-256: 2b52ded309d779d32ef7ed4c6e2de743e03b2eb1dafceb373223e21f5009ff30
font_01_sfnt_off00008789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8789 17860 bytes
SHA-256: 372d64fe8ef96255a12fa644d41377f2b117b1e32b2da9ab2f07e049597555f8

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