Malicious PDF — malware analysis report

Static analysis result for SHA-256 371492ff1c955939…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 03:37:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5775493ca0e936bdfe4ee32d239ea036 SHA-1: 9b6eda1c0441e02e1b4fb487c9af3c2bcf5ee95d SHA-256: 371492ff1c955939f433b76cf71863c3858d4a7df70431c0698f1e111c9752eb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to a website offering 'free coins and spins' for a game, which is a common lure for malicious redirects or downloads. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate a redirection to a game hack generator. No scripts were extracted, but the embedded URLs suggest a phishing or malware distribution attempt.

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-free-coins-and-spins-daily-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/robux-xyz_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-cheat-client-juillet-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-card-redeems_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-just-by-downloading-apps_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-hack-download-android-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-com-r_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-free-avatar-creator_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-fast-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-website_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_off00002fbf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FBF 22940 bytes
SHA-256: 996c66e0e468d34389a92e28c9d8c27fff997ebe9e1b2184c212b0b6e24d7f57
font_01_sfnt_off00006374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6374 18772 bytes
SHA-256: 9a55712549d24f40bd9168c897c03b6f38d3aaf5d93578d14a86cb5737851a0c

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