Malicious PDF — malware analysis report

Static analysis result for SHA-256 455266a18eae09c4…

MALICIOUS

PDF

35.0 KB Created: 2021-06-22 15:09:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 856fb01df80685d18c4a1b8f218cf998 SHA-1: a73e8b13ecaeffbe357539d05f7514ccda54684b SHA-256: 455266a18eae09c44095a4e5cd71cdc4f064673143d3c8e5a1d26df94d618bcf
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.co/app/431946152/games-that-give-you-free-robux-game-hack PDF link annotation
    • http://jarviskeller.co.uk/media/storage/editor/files/free-roblox-accounts-with-robux-no-pin_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/roblox-free-ss_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/roblox-free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/roblox-lumber-tycoon-2-hack-xbox-one_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-minecraft-capes_GM479516143.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
font_00_sfnt_off00002f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F28 22692 bytes
SHA-256: 09a084f8762c1ef1f9fa740027b270702b22fdc20af159d7d03289453a02032b
font_01_sfnt_off00006206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6206 19644 bytes
SHA-256: f2ef61d464a1197aa82024f03da1d5af6fa3bd93677ebddf5a94754dddc021ec

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