Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f46bd3a0e25c80…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 03:46:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ec28798c047343dd84e9a1e914776229 SHA-1: 238a7e2ea376847ded2fe6aa85eb825189879d0a SHA-256: 79f46bd3a0e25c80f42fb8614b207f6f96344db00dcb84f00c59863621e9bd90
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/479516143/minecraft-free-edition-game-hack PDF link annotation
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/kron-hack-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/hack-roblox-payant_GM431946152.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/giving-away-free-roblox-account-with-robux_GM431946152.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dhs.or.id/new/public/ckfinder/userfiles/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://dhs.or.id/new/public/ckfinder/userfiles/files/roblox-transparent-pants-free_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_off000031c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C3 21868 bytes
SHA-256: e0b72e7c47968d6b9e76c4213abb2c078ee035858e96906e757c9295daa7d173
font_01_sfnt_off000061cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CB 18172 bytes
SHA-256: db192e3ee1b597e90d8ba86701c1d854579a97db55fa1bd01759e1179bda7501

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