Malicious PDF — malware analysis report

Static analysis result for SHA-256 54dd2c3c27c08220…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 12:33:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 13e6ba3ae1392646dc80a2e57de0fff1 SHA-1: cd039400a1a1916ac694f3e9fa6bbaf1ab3cf43d SHA-256: 54dd2c3c27c082203cdac2a8685930358c53f20e54d38d6d49df2e3e0237d607
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/406889139/fb-coin-master-hack-game-hack PDF link annotation
    • http://librarystkippgribl.com//repository/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/tiktok-free-edits_GM835599320.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/pubg-uc-logo_GM1330123889.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/tiktok-free-code_GM835599320.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/latest-free-spin-coin-master-daily_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_004_off00004fec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FEC 24512 bytes
SHA-256: 9bb744ed4b8886c0cde1d9072eafcd02ff32a1cd653b0def3b8c22df6b740855
font_01_sfnt_off0000870d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870D 18040 bytes
SHA-256: fbb613cf7ce1cb36a0a8d280c3838effdb84971329b91d5b96a8bc41d66c780c

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