Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7a2faac8a20a64…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 13:48:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bc8f718749b58860cc3c49bed6f08486 SHA-1: 2187fc76d4a7295b2b95832f1129121405f87113 SHA-256: 1d7a2faac8a20a642f31e838db9e4aeb5950458e88180b34e42fdef94758e511
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 0.9865

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/406889139/80-free-spins-coin-master-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/oginject-co_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-prices_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/play-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-glitch_GM406889139.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_004_off000050a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A2 25552 bytes
SHA-256: 0b0f866403abf49be2b2cce7369dc5f9cff5b1746ed23a895b0d455510652a9e
font_01_sfnt_off00008a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9F 18268 bytes
SHA-256: c17bdfe55bcf294db1fa8b97ef7603a16e409092d20395243f391f783e354714

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