Malicious PDF — malware analysis report

Static analysis result for SHA-256 671d028d2277beae…

MALICIOUS

PDF

33.3 KB Created: 2021-06-28 23:25:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ccb32ccb9f4ac51aef5b77570213d3ba SHA-1: c1e5783e5fa6835a47b93d37e13020c768b0de2b SHA-256: 671d028d2277beae161d03715c9e4c914827ea6ccaf71d9e55e40b9791a3b2c3
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 0.9824

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.co/app/431946152/pastebin-robux-promocode-hack-2021-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/how-to-make-free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-into-builder-mans-account-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/pastebin-raw-roblox-change-name-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-dead-winter-infinity-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-admin-commands-on-roblox-by-hacking_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-admin-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-into-other-peoples-account-on-roblox-mac_GM431946152.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_off00002a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1C 21968 bytes
SHA-256: 6a1b05ffc4835fc9b8804abc1cbeaad3db6fa6ec0dd33ce3bb4ee367b87a6343
font_01_sfnt_off00005aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA3 19936 bytes
SHA-256: b2cc9438907db99a1635b4c0d377cbb1dea5ae1e6de710879f52a54f2f1373c2

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