Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f93e72755c97b7…

MALICIOUS

PDF

48.7 KB Created: 2021-06-03 23:51:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1f6929f06beb6825ad4728838ce4eea9 SHA-1: 853509e440da9497fe8580a1a119cb4a0fbb6167 SHA-256: 93f93e72755c97b7ae45e4a92e803ff40fdc8767a6010dfb4ff5f9fb1208b27a
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 0.9796

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.online/app/431946152/free-robux-live-game-hack PDF link annotation
    • https://perpustakaan.stami.ac.id//repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/easy-robux-today_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/open-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn 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_004_off000051f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F7 26332 bytes
SHA-256: 6754f82025de8570a9ddc52991ef4db7bf92b24aa7fbfea9c644ba5bfb2fcebd
font_01_sfnt_off00008ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED9 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BEB 18248 bytes
SHA-256: 2e5a72f8344bcf9b425e9fd022f0a9c5c2029812f1a4b00ba9f2a8ee504eb572

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