Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac61030c72c0807…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 12:57:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6aae57643f629d823ff754c120bc269d SHA-1: 42764cf1f3b0c4e3bba6024186cd31692867cdd8 SHA-256: 5ac61030c72c0807eb7d55801de75e8eb9ac5094220aa64e28f3d0d18d2e1a79
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to game hacks, specifically for Coin Master and Roblox, directing users to external URLs. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous game-related URLs strongly indicate a social engineering tactic to trick users into visiting potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

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/how-to-get-gold-cards-on-coin-master-hack-game-hack PDF link annotation
    • http://perpustakaan.dutadharma.ac.id/repository/hack-avec-les-code-promo-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-hack-a-roblox-accounts-2021-on-pc_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-roblox-loot-bags_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-roblox-exploit-no-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-fly-hack-not-a-virus_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-no-playing-games-or-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-apocalypse-rising-hack-september-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/irobux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/mod-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-promo-codes-2021-august_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-hack-ios-12_GM406889139.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_off00003001.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3001 22464 bytes
SHA-256: 4204695fc5a2be466a97c9bab2c773c9a39f0c33a187eb0040bb5c2d54ec9712
font_01_sfnt_off0000621a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621A 18416 bytes
SHA-256: e29a79d2dbf06b1454da60d703e80c2f486a3031885ec1def1eabe45c18abdb3

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