Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f40775bedd6b80c…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 08:58:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9f3b49817dfbd8ade65b73290d8779e6 SHA-1: fd6fd1f47325ae0312bb627eea7aa612e9db8a94 SHA-256: 3f40775bedd6b80cc1fab3d51a2e5ed64a5f9a6318ead5e155f4d84022cedebe
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/roblox-avatar-free-game-hack PDF link annotation
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/pokemon-go-free-promo-code_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/plug-toolbox-for-minecraft-free-ios_GM479516143.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_off00005262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5262 25716 bytes
SHA-256: dc8f8350a866d95c1c7f0b8b3942a8bf73887f95a4d5eeb7d64e723e7456f7f8
font_01_sfnt_off00008c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C14 18396 bytes
SHA-256: fabbc4d33b4fd44a10480a095a1b5872a696080c7c42ded8a290903470f97fc4

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