Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8d2fbff8f3f0a3…

MALICIOUS

PDF

43.7 KB Created: 2021-06-13 21:05:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: dd2a0a698e28451dd69496dec9a37def SHA-1: 91b48fb89ff25ff2214f3f6f34768e75d2e8e7b7 SHA-256: 5d8d2fbff8f3f0a3579539feeeaf58f847a0842ce15da211a12adecb7c416458
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 0.9969

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/431946152/how-to-cheat-on-roblox-to-get-robux-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-to-get-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-vip-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/pastebin-robux-promocode-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-accounts-with-robux-2021-november_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_003_off00004b25.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B25 26584 bytes
SHA-256: 6d1e1aed06a4d37fccf772c68c301bb47938592d3c654eaf9f86fa1c953d2718
font_01_sfnt_off000087b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B6 18584 bytes
SHA-256: 9e74fa3804886e4a465bb517abebc2e3ce7da128cfbadb0edf8c203e091c893a

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