Malicious PDF — malware analysis report

Static analysis result for SHA-256 943fd6f66db937e8…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 04:47:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8a30b089337608d4da9f9b5f9c168a90 SHA-1: 92cbed326d26f2daa424c4950e0676fb37f28919 SHA-256: 943fd6f66db937e88f6888684707ddcde2c2f0c5aeb816db14fc607677cb324b
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 0.9865

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-site-game-hack PDF link annotation
    • https://perpustakaan.stami.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/freespinandcoin_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/roblox-g_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/body-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • https://www.roblox.coIn 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_004_off00004dff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DFF 26772 bytes
SHA-256: 6800b91c59f602f4ff13a8c1006ce57917a5a4e17aae2db6ce6f4c4952559689
font_01_sfnt_off0000880e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880E 18236 bytes
SHA-256: d17cd47be652198dd65b1182653c5b68eec39c9a25c2fe205f68dda680ae7be3

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