Malicious PDF — malware analysis report

Static analysis result for SHA-256 90949822afe7f471…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 08:14:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0cbfd193f1d372a71952cf724865c1c9 SHA-1: 1377e962d36aba46691656a6f88b3022aed987d6 SHA-256: 90949822afe7f471ad70ba333b92a1ca91ffe35c6b2da75595a9a5f078fe2f22
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/blox-world-free-robux-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-any-shirt-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-cards-live_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/google-how-do-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/nonsense-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-bodyies_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/cheat-speed-city-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-gift-cards-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-and-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-story-mode-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_off00002f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8F 22332 bytes
SHA-256: 330a6e80e75d10aea2fa4f739b9bf3ddbcaceab94886ead3884c45a6637dc2d6
font_01_sfnt_off00006131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6131 19160 bytes
SHA-256: 42e554ef2c91bbb5af350d4b1f45d0a0f829397bc38bc7c2009f5bdaf8074c39

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