Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b8cfc9227b7991…

MALICIOUS

PDF

34.5 KB Created: 2021-07-07 05:43:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e99c58ebc7eba7a772a757b6d5b41889 SHA-1: 092fc5b64996f0f1d3a491364ec38525317ed576 SHA-256: 93b8cfc9227b799102accd0c6822e6b357ffcdd8a0988fba67662fddb98dcd08
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/coin-master-free-chest-link-game-hack PDF link annotation
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/roblox-pro-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/roblox-cheats-xbox_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/roblox-pizza-cheat-engine-script_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/roblox-studio-hacked_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/roblox-jailbreak-hacks-for-mac-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/microsoft-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/change-clothes-by-id-roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/roblox36com-free-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
stream_002_off00003015.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3015 23164 bytes
SHA-256: b2da3c630e0c042b9b318f17509f6da92e3b3bf85e7071a1e9dc43d2328d9e93
font_01_sfnt_off0000645b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645B 18332 bytes
SHA-256: 36eb1d49db69b3f8cd4522fc98d80e4be0a8c277c726e9d9c6bc938385f2622b

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