Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ffb3d0164d340e…

MALICIOUS

PDF

35.1 KB Created: 2021-06-28 06:43:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 751f122523eae66aa5f172dcc6c9b353 SHA-1: da36d9d764d2e4c2c5020217ef7b88ab72019c50 SHA-256: a8ffb3d0164d340e009699393796cf733fdb3ced3dadc89a848b3c3f541b179f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free in-game currency, such as Robux and Coin Master spins. The primary link, 'http://netcdn.co/app/431946152/hack-pp-jailbreak-roblox-game-hack', is identified as a redirector lure for game hacks. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or malware distribution.

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.co/app/431946152/hack-pp-jailbreak-roblox-game-hack PDF link annotation
    • http://suaedy-library.net/repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-hack-into-someone-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-download_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/descargar-hack-robux-para-pc_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/cheat-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-cards-for-free_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_002_off00003079.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3079 22756 bytes
SHA-256: f9714f1dfc1a1eb9ebf98f9ff640667d72d9e71655de683fa6044d2d88036d23
font_01_sfnt_off000063a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A6 19272 bytes
SHA-256: b9800d2b9b12a1547f9080d7cf7ff0f8db42b7ce861ddd4f2bfaa17be2d5b491

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