Malicious PDF — malware analysis report

Static analysis result for SHA-256 52bb9bb9394b1133…

MALICIOUS

PDF

51.1 KB Created: 2021-06-03 14:36:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 0813f0e52d7ad4bd4eed37022e004762 SHA-1: 1101a58d352953208239372283b5880883418a66 SHA-256: 52bb9bb9394b1133e0809710461e010323c0ed8c4dbf611fa5b75f82779f5a4f
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 0.9724

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/but-link-says-free-robux-game-hack PDF link annotation
    • http://slim.sisminkada.net/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/cone-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F9A 31892 bytes
SHA-256: c8a27f1530fa530c3d242de7a8083420f239952c009efade8d74bb49768dc70e
font_01_sfnt_off000096cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96CD 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off0000a375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA375 18816 bytes
SHA-256: 8fbe90bccae9ee3155d3d967e7829d2e05c9e53767c9dd01fe36dc6e4248615b

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