Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ead4a9d22fb6f4…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 12:36:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a97e2f5c1d490be386f384361bb56dd1 SHA-1: 2fae30a8707d04b4c6674aa6c2100a8b1b06994d SHA-256: e6ead4a9d22fb6f47cc7b1d02fa9b993c7960cc32a1b7d5334a37559b98b904c
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-hack-using-lucky-patcher-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-online-game_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-assassin-free-knives_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/simon-says-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/dowload-free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-tycoon-games_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/the-final-stand-2-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/download-roblox-hack-robux-apk_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robloxcom-how-to-get-free-robux-only-today-ad_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-2-roblox-credit_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/pastebin-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-account-pin-hack_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_off000031fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31FD 23088 bytes
SHA-256: 6403a8b977eb73ec5cdb4377550bbbbfd5f6e4e7b655fa5d4722c4c04a804a97
font_01_sfnt_off000065e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E9 18832 bytes
SHA-256: 4e42799b3572d1241d93d93b188e429b6a90beaba4def4bd8627acee4e24b07a

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