Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4f4c92c7ff51d9…

MALICIOUS

PDF

47.5 KB Created: 2021-05-15 13:13:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a0d064efdcfd99aea782877db9ab5ea8 SHA-1: 7dcfb9a8e202f57fb8eb1a9bfe7828e279c2655d SHA-256: 8a4f4c92c7ff51d97e5206fa4af54dab5ba657c0011318134974868ff72a4dab
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 0.8715

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-links-2021-game-hack PDF link annotation
    • http://smart-pro.co.uk/images/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://smart-pro.co.uk/images/robux-survey_GM431946152.pdfIn PDF document text
    • http://smart-pro.co.uk/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://smart-pro.co.uk/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://smart-pro.co.uk/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://smart-pro.co.uk/images/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://smart-pro.co.uk/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://smart-pro.co.uk/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://smart-pro.co.uk/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://smart-pro.co.uk/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://smart-pro.co.uk/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://smart-pro.co.uk/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://smart-pro.co.uk/images/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://smart-pro.co.uk/images/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://smart-pro.co.uk/images/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • http://smart-pro.co.uk/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://smart-pro.co.uk/images/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://smart-pro.co.uk/images/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://smart-pro.co.uk/images/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://smart-pro.co.uk/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C4 25296 bytes
SHA-256: 79bec26167b398dcef74011a61a7e312634e49a28b2f42359b5995c1964d06c3
font_01_sfnt_off00008280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8280 2944 bytes
SHA-256: e8dca988325d5b5adea380508eed68725fcb814536e93cd420f224b7166adc23
font_02_sfnt_off00008cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAC 18116 bytes
SHA-256: 6c2a50199d9b46215a875dc9668b69110360059bd5b64fd0f73058dd3f4c0f4e
font_03_sfnt_off0000ae64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE64 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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