Malicious PDF — malware analysis report

Static analysis result for SHA-256 8efff98d1fbe1072…

MALICIOUS

PDF

33.5 KB Created: 2021-07-06 01:20:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cf87053b22936ee2a1634a9988e60e7e SHA-1: 424364b792233b044447f8d858be5c8c33a15a60 SHA-256: 8efff98d1fbe107205df29bf8d9564f4480c520e548b9f1bccd5b5a222b2fb72
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-confidence heuristic firing for a game hack redirect lure, pointing to the URL http://netcdn.tw/app/406889139/coin-master-twitter-game-hack. This URL is embedded within the document body and is the primary indicator of malicious intent. The document's content and the associated URL suggest a phishing or scam attempt to trick users into visiting a potentially harmful site.

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-twitter-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-coins_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/commands-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-roblox-hotel-elephant_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-easy-no-survey_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/r17-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacked-text-to-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-in-ice-mountain-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-hack-on-android_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-to-take-games_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-dragon-ball-infinity-saga-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-bypass-roblox-cheat-engine_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
font_00_sfnt_off00003140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3140 21696 bytes
SHA-256: bfe8b9f7c5a7c829046ea13225a5b8500963cd78201245a878f284b457312494
font_01_sfnt_off00006103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 17996 bytes
SHA-256: 08eb777ca11051aa95651408cba01fcc727dafbd0d85fbf60a16ac827606a4e9

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