Malicious PDF — malware analysis report

Static analysis result for SHA-256 663e81b7567cfe90…

MALICIOUS

PDF

33.5 KB Created: 2021-07-06 03:00:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0ce6e0db81b93fe26726039f266e2d80 SHA-1: 819c9dcb7dce6ae27d7f02eb6e79c8f4809ec389 SHA-256: 663e81b7567cfe90b9f3824808308dfa89602ce3c5c17bcee10dcf14e3fcd9ee
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/406889139/coin-master-time-hack-ios-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-cheat-codes-for-money-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-official-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-hack-mago-by-out-wit_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-set-skybox-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hack-robloxco-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-hack-teleport_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/prisonbreaker-hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacked-robux-oh-shit-meme_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-build-a-boat-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/jailbrak-roblox-hack_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_off00002e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E57 22368 bytes
SHA-256: 0b80d700af95c3c27634ee17409feecf1357c9e029d4834d569d2c8cb0239ee4
font_01_sfnt_off00006011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6011 18264 bytes
SHA-256: e044f2111956dd3925dd1ff7e5ca2de0ff7ca221e79223e1f430a3df40f93c8b

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