Malicious PDF — malware analysis report

Static analysis result for SHA-256 885d5a161b8bf28b…

MALICIOUS

PDF

35.7 KB Created: 2021-06-26 18:25:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 73e5ee98bf03cb42eb079349137a4f26 SHA-1: 331a1ab6a676a71c6e1754e09ba04a3d8d989ea5 SHA-256: 885d5a161b8bf28b549a556853b3c4f72b0458df85aea51dfdb37e9e24774d9c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Robux' and links to external URLs, including 'http://netcdn.co/app/431946152/how-admins-get-free-robux-game-hack'. This suggests a phishing or scam attempt designed to trick users into visiting a malicious site. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure strongly indicate a malicious intent to redirect users to potentially harmful content.

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.co/app/431946152/how-admins-get-free-robux-game-hack PDF link annotation
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-roebucks_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/roblox-free-skin_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/roblox-admin-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/how-to-wear-free-models-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/coin-master-free-spins-no-human-verification_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
font_00_sfnt_off00003496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3496 22068 bytes
SHA-256: 7b67547bbc20588ab9b4aee21f3c5cb1bf1fa3f1805a36180ef7d9cc96c00c9b
font_01_sfnt_off0000652b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652B 19536 bytes
SHA-256: 2506bb28f2be5ebf537eebd7735e741e56e9e0bceb24c62e069641ef012746aa

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