Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5e05d810a92e9c…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 11:35:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e161d4f239747e07708cf2c799586ae9 SHA-1: c8e45343b021a56cf91079b8aa9bf258512bb29a SHA-256: 2c5e05d810a92e9c6e92a58d1bac15e2ef4c8189e5e9c7d524f572ef64d669ee
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 0.9980

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.tw/app/406889139/coin-master-fan-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-free-camera-not-working_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-roblox-counter-blox-download_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/games-like-roblox-but-free_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_002_off00003160.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3160 22520 bytes
SHA-256: bd366412e686040bcc525928652db7a54469bc9511481e7f5a6a8e364375339f
font_01_sfnt_off000063c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C7 17996 bytes
SHA-256: 2ec206c530faa3d40eac36f14655b3e9b935e9ff12c648634e177d5bc9421463

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