Malicious PDF — malware analysis report

Static analysis result for SHA-256 9194378f69bbfa4c…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 09:15:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 71d8eb937b8d242ccef8e0a765151b00 SHA-1: a9a29a0c78ce6779c818fda72ff3272d9887ba08 SHA-256: 9194378f69bbfa4c2a13044cafbc7b36165f08ab106d6423b1b8c99f65dba8f2
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 0.9980

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/coin-master-daily-free-spins-2021-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/free-robux-trackid-sp006_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/pastebin-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/gravity-hack-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-claim-your-reward_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hack-roblox-phone_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/der-grste-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/testing-free-email-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/fast-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-robux-2021-2021-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-make-a-dominus-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-pets-into-pet-simulator-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-roblox-with-terminal_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_off0000309d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309D 22948 bytes
SHA-256: b1fd138d7ef8807d146287a0fa0fa81ab45847219e2b96b14393f9ff8158cb15
font_01_sfnt_off00006404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6404 19000 bytes
SHA-256: 528a935dd58865e4a106a1d117939a17801f064f5f0487dbd1677077be344488

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