Malicious PDF — malware analysis report

Static analysis result for SHA-256 228cbec32e380206…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 02:40:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1472f31c88490487f350d2768cd56f73 SHA-1: 6255c01c31967b6fe59ea62c5fec76a0bfb37512 SHA-256: 228cbec32e3802062d7fdaac466cc3fbaff437e8f159dbd527db47738987c62e
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/479516143/clients-minecraft-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id/repository/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-hack-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/b-tools-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-bots-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-cheats-for-tickets-and-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-redwood-prison-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-snow-shoveling-simulator-how-to-get-free-money_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-thru-discord_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-robux-hack-computer_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-links-to-coin-master_GM406889139.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_off0000316c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316C 22180 bytes
SHA-256: efa88dbfeb0b842cb589356dc412bdd97161443b78dbc5e12da1f8d4dae188cf
font_01_sfnt_off0000623e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623E 17928 bytes
SHA-256: 7e7ab3f604136df531f2e92a0bf311d09ec166787ef8857d042cbe77ee495bd4

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