Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4312466bb64ba6…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 08:49:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2cb10947b435e24dbafb696e73460ef4 SHA-1: c2f62f8955230d396cb82ba3f550ba799e5399c9 SHA-256: ad4312466bb64ba67142ee1bfb6efbe12bcf539b74e6f3c2d78c29ab7c941ae6
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/431946152/how-do-you-get-roblox-for-free-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox-accounts-2021_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
stream_004_off00004f42.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F42 26944 bytes
SHA-256: 3cbf3acfa5a706911c7333444a61682b68c89d1c75fb8a9224be1d240885bd9c
font_01_sfnt_off00008c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C71 18688 bytes
SHA-256: c319980467b8bcea808cf7446b1cb0422dd1c28f9b99e7a79dce679e259df094

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