Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cdf19cc918b2baf…

MALICIOUS

PDF

44.6 KB Created: 2021-06-08 17:35:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0f4e7fb3d889d6358987cb09559dc942 SHA-1: dae4d0c7724ffe37821ff4de1c860197468ee247 SHA-256: 4cdf19cc918b2baf381a6015ad903ca3bae894ea7bdcf9139de1a4363db11c31
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and links to a website that appears to be a redirector for game hacks. The embedded URLs suggest a phishing or scam attempt to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful content.

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.tw/app/431946152/free-robux-with-email-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-converter_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-truly-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-minecraft-pocket-edition-for-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
stream_004_off00004f45.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F45 25224 bytes
SHA-256: 2e50defae725db0c5d92ebb5274ea6e71c2d4354b8fbfc34789c27bb6fd04b1c
font_01_sfnt_off00008915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8915 19164 bytes
SHA-256: 8266e9826c5cc96667e4108fe9ed7775894a46eb3bb24830821dd23971ab00ac

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