Malicious PDF — malware analysis report

Static analysis result for SHA-256 900b6f9837c81bb0…

MALICIOUS

PDF

43.6 KB Created: 2021-05-12 08:48:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 85b0d6c246dc81ad93745a9859760cae SHA-1: f69bc1641a647a65d89325c439e2a05b706f71e9 SHA-256: 900b6f9837c81bb065af2fa6f25d567e7bd23dc6f6f394306b10efe75d1c5923
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 0.9969

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.xyz/app/406889139/coin-master-attack-madness-hack-game-hack PDF link annotation
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/roblox-comroblox_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/what-is-a-robux_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/hack-download_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-group-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/earn-robux-now_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
stream_003_off00004dd8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DD8 25660 bytes
SHA-256: 65ae04f5230ea39a9c53ce24d198f368504b8441d665fb098c6fb3026107180a
font_01_sfnt_off0000892c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892C 17888 bytes
SHA-256: f7a53a65286f7c98125d4d45247e8746e7e120bffcc9c77c9c81cd5151e0f106

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