Malicious PDF — malware analysis report

Static analysis result for SHA-256 280d9ce922b6a1b5…

MALICIOUS

PDF

48.0 KB Created: 2021-05-12 15:15:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 14cc81cc4b054914a507ed62eeec51a5 SHA-1: 7089e1742f6d24bf29f6affc9b15a62858124f92 SHA-256: 280d9ce922b6a1b5a0d787e28446b1fcbd6ba0c9e6dd1b9b098933253b6e8b52
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 0.9013

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/how-to-earn-robux-game-hack PDF link annotation
    • https://rblx.landIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-only_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.roblox.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a31.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A31 28484 bytes
SHA-256: 9bed13a87e879d7e91805fedaff20fe95a49bd365a9bbbc6c8e1cd6c186d730f
font_01_sfnt_off00008c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5A 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000996b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x996B 18244 bytes
SHA-256: e59d0dbfa916da45dc1e57bbb1674eee7460563807a8b8eb6343b67328d59b2b

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