Malicious PDF — malware analysis report

Static analysis result for SHA-256 545814c5b80b762a…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 02:41:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d6f35787c026e9d2237ae40d60428101 SHA-1: be77f682130ebbacf4e95bcaf2495bb9d73e8dff SHA-256: 545814c5b80b762adf27ca5e6c984c1976a7ba699f7c1842c8eb8f2bc9fe7c60
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-hacks-2021-game-hack PDF link annotation
    • http://library.ft.upnvj.ac.id/repository/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-website-template_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-jeff-the-killer-shirt-free_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-roam-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-money-on-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/emojicode-roblox-2021-get-emojis-free-2021-d-_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-robot-animation-pack-free_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/como-hackear-a-alguien-de-roblox-y-tener-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-robux-money-for-free_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-skins-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coun-master_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-hack-pw_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-instantly-get-free-robux-in-roblox-oprewards_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-not-a-scam_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_off00003258.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3258 23180 bytes
SHA-256: 144bc46d3262bc6d6d358bc02b1f7c8623083b57f25f1ef15ab5c57ed8b2f59e
font_01_sfnt_off00006697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6697 18408 bytes
SHA-256: 8438728008f6ab05b5c9a65d4eeb1f2e5c23a436eadc11c6e76328f72b7d7fb7

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