Malicious PDF — malware analysis report

Static analysis result for SHA-256 27cb7e1c932ef236…

MALICIOUS

PDF

34.7 KB Created: 2021-06-27 06:58:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0d2ef859b5481516dc47890435abe1f8 SHA-1: d5a1df06e6981d5aa728384ffbec375310103c5a SHA-256: 27cb7e1c932ef236f5f2703194cd9659c9d6d0fe7f1e50691adbfbffe137e957
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/431946152/free-rubux-cheat-roblox-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/ghow-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-hacks-for-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/http-roblox-hack-no-varvaction_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hack-bars-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-eploite-for-free-download_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-1m-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-how-to-noclip-cheat-engine-feb-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-parkour-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/nombres-para-roblox-de-hacker_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hack-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-marketplace-free_GM479516143.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_off000030ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EA 22332 bytes
SHA-256: 4c863d09da7dabb1532fbb80b95c5b252cb7a7bc898c883e1f29476f619bed47
font_01_sfnt_off00006299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6299 19060 bytes
SHA-256: 5b99a6cb48afd98567bda4d672a59ddb7cf02863d0f702912904609b9f909252

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