Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe3cec7b6577081…

MALICIOUS

PDF

44.2 KB Created: 2021-06-04 02:33:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 579f1b9717bb283144ce5328719c057d SHA-1: 00ebb4b847325907290fa23383d8cb8383bc6408 SHA-256: cfe3cec7b65770816d930fae5eb11ab8db6b776822846724f2c6cf0ece604ffd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lure users with promises of game hacks and free in-game currency. The primary URL, 'https://netcdn.online/app/406889139/coin-master-free-coins-links-2021-game-hack', is identified as a redirector likely leading to malicious content. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or malware distribution attempt.

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/coin-master-free-coins-links-2021-game-hack PDF link annotation
    • http://pustaka-smpn3tpi.com/repository/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/website-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/master-coins-free_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/google-play-coin-master-free-spins_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
stream_004_off000051ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51AC 24724 bytes
SHA-256: 6d0ae16d41fc2b5422afc43856d4741dcdec23393839ef9e0bf6b331582b446a
font_01_sfnt_off00008a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A13 18284 bytes
SHA-256: be459003f2db1a934c49859962f2962ce704e042ee0985c73311b64c11e09449

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