Malicious PDF — malware analysis report

Static analysis result for SHA-256 3507bc5df56f7733…

MALICIOUS

PDF

45.1 KB Created: 2021-05-16 22:00:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ef2f00fc7aacab4ae015171e86f82fc2 SHA-1: 828777d20ee8088d72f5235f4f20f7a3bb021f92 SHA-256: 3507bc5df56f7733f3e9718879a16230940f966894b5bc8ee8d400b46c5ced33
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 https://netcdn.xyz/app/431946152/roblox-hack-ga-game-hack PDF link annotation
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-link_GM406889139.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-free-100-spin-link_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_003_off00004b34.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B34 30164 bytes
SHA-256: 14245222a7444be61445b34f45447f2a9d1a6b90179150cad6453c71277f54ef
font_01_sfnt_off00008e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E49 18184 bytes
SHA-256: 3275d650180bfb45a9fb7d5756aac43dcbbafe87c7818dab7a1b2e1f44194404

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