Malicious PDF — malware analysis report

Static analysis result for SHA-256 3907d8fa73b6a7a9…

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 21:57:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5a0507707dd381a330beb38cb0f2a271 SHA-1: 5adfdc2fa7846e77be900309e9ba7d87b236e6bb SHA-256: 3907d8fa73b6a7a99a54347cba2a3cf7099af9ee71eea39ca61ee8498ac6e998
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 0.9769

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/coin-master-daily-free-spins-link-facebook-game-hack PDF link annotation
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005159.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5159 24880 bytes
SHA-256: 8a83280d084983964d5b147fc75b467d181871b88d7b654b80f2e6d5bb5e8b12
font_01_sfnt_off00008ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC3 3500 bytes
SHA-256: 0ed1761f4e10049dbabdfde525d716995c1a30072e354a33f6c222630e768ae1
font_02_sfnt_off00009662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9662 18636 bytes
SHA-256: 50d107b0548bd3d005e8b5e4f9cf847a43b3082c8a2089b5591d39299d79db66

Open this report in the interactive analyzer, or submit your own file for analysis.