Malicious PDF — malware analysis report

Static analysis result for SHA-256 7923f6f7db24a524…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 04:02:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 91fb94ab511761ad87fa4cfa43d8ea2a SHA-1: 80125eb226c1055e35b65a8c554bd9602e7ae241 SHA-256: 7923f6f7db24a524ce30d21e4ff4691405a5f56d0ffa87b289f364cab470cc07
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-apk-mod-game-hack PDF link annotation
    • https://perpus.upp.ac.id/digilib/repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-game-card-generator-download-free_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/test-roblox-clothes-free_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/descargar-roblox-mod-hack-apk_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/pastebin-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-long-does-it-take-to-hack-roblox-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-may-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/fhow-to-ge-free-robux-no-scamcom_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/alpha-hack-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-game-for-pc-free-download_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_off00002fce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FCE 22332 bytes
SHA-256: 1668d70107094e74a96840a117360c7e2241ae77b8a3e7011368ed1de8d66ac1
font_01_sfnt_off000061aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AA 18352 bytes
SHA-256: 0498d856b1ddeaa0b4351f444253866c0e405fd0ea58071870a38ccc4886830d

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