Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c5cd0be51362c78…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 18:14:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 87a696aa7ac2015de05d63e50065f3fa SHA-1: 6c49c9a210ab3fa0c8bbee90bd59cadd92b5f580 SHA-256: 3c5cd0be51362c7885f42439be7d0675bcaaf430f4b1edce5807241def87a2cb
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/431946152/give-me-robux-now-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/comment-avoir-la-free-verification-pour-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/arsenal-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-promocodwes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/pagina-de-hack-para-robux-gratis_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-on-roblox-simple_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-red-hoodie-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/cool-free-roblox-outfit-without-clothes-and-colour-body-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/400-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-prison-life-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-your-friends-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-catalog-items-roblox-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
font_00_sfnt_off00002ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECF 23084 bytes
SHA-256: 15f6c0d2c0f3b629ad49410ab9f4c1f49ec968268d0d663e6a48ab9eadfc1051
font_01_sfnt_off000061b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B4 19144 bytes
SHA-256: 4e2a3ce40f10caa3e5ad6ab7b54716fa6c0edc928f953ee2f302d526ca99eef3

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