Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a6d7913c3bee6c…

MALICIOUS

PDF

48.7 KB Created: 2021-05-10 13:45:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 90bbc2d5306f078805ab40431de6fdee SHA-1: 5f8ccdfd05b61cd55d1874119ab97dcc1a04e18b SHA-256: 64a6d7913c3bee6ca04d3f1a760f32e1f6173999732df704abba8c00bdfca71f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to websites offering game hacks and free in-game currency, such as Coin Master and Roblox. The primary lure is the promise of 'free spins and coins' or 'free robux', designed to trick users into clicking the malicious links. No scripts were extracted, but the presence of numerous game-related lure URLs and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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.xyz/app/406889139/coin-master-daily-gift-free-spins-and-coins-link-today-game-hack PDF link annotation
    • http://library.itekes-bali.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ce3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CE3 24940 bytes
SHA-256: 3b5a660f4eff9b6f89a67282a49cc929bfaea7ae41298d9fcff354003267dee0
font_01_sfnt_off0000864d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x864D 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00009ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD8 18652 bytes
SHA-256: acc88e8ff3d4d09cb66d664b97f6065b804d1ea0ab1b79688b3054775362f50f

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