Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf0488a0b331163…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 13:51:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8ef58168788a81ec93145f543dee1da9 SHA-1: 9bbee5a9d3425602efa17c0834f8d7487b503df0 SHA-256: cdf0488a0b331163c3997da6ee4233e10463502bdfd24f427b60b2156fee7804
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/how-to-get-free-spins-on-coin-master-2021-game-hack PDF link annotation
    • https://tanahlot.id/assets/CKImages/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-hack-roblox-jailbreak-go-through-walls_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-blogspot_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/advertise-your-roblox-game-for-free_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-highschool-tix-hack_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-free-robux-on-roblox-on-ipad-2021_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-free-roblox-money-on-a-phone_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/game-test-roblox-free-bc_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-download-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-more-robux_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
font_00_sfnt_off000031e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E3 22480 bytes
SHA-256: 6f38ff168670caa425b8dbfd93c4b12b70db38a4fa8ea4fbab19ff651e2e1775
font_01_sfnt_off00006418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6418 18740 bytes
SHA-256: 0260418c40462ede441e23edbbaa28f8ef5f7472ee43e2d563702d50e072c039

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