Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe036c629ea43b42…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 02:54:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4ef19d8fa86a9a842a72a80b56f2d891 SHA-1: 9d51428974e73ce497530b4b8faea2886f6721b1 SHA-256: fe036c629ea43b4298bc3e7f327ce764d1126b58b44a8d1ababb2ea6dd7dbd44
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.co/app/406889139/coin-master-facebook-hack-game-hack PDF link annotation
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/free-robux-obby-made-by-stickmasterluke_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/how-to-get-unlimeted-robux-for-free-with-copying-notes_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/cheat-coded-roblox-minning_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/roblox-explode-hack_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/free-spin-coin-master-2021_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
font_00_sfnt_off00003090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3090 22524 bytes
SHA-256: fb9d2a217746e62adc4a92e517a447f2fa3a9bc832123e15fa1862b1f1044277
font_01_sfnt_off000062a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A1 18324 bytes
SHA-256: 6ad1846c5a228a809b9de1cefde13e0c6880a4115f839aceb456980284c5160f

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