Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8a652c69d3eac5…

MALICIOUS

PDF

35.8 KB Created: 2021-06-27 10:10:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d70a512ce3983f2f8b0fe911963dfe84 SHA-1: 496d7d6f1290b85591572be6d35634743f968df2 SHA-256: 5c8a652c69d3eac58af4d0f97924dc2264b037a62f1ab2d64450df11d8293658
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.co/app/431946152/free-robux-without-human-verification-or-survey-or-offers-2021-game-hack PDF link annotation
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-robux-website_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-bloxys-arcades_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/how-to-hack-bc-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/fly-hack-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/cute-roblox-outfits-for-free_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-script-executor-roblox-2021-no-virus-no-danger_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/roblox-hack-no-scam-robloxian_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/900k-robux-free_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/create-free-account-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/how-to-change-your-username-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/roblox-free-audio_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-roblox-beanie_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/download-roblox-on-ps4-free_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/roblox-hack-tools-download_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
font_00_sfnt_off000031dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DD 22072 bytes
SHA-256: 0d1eb27543c0ac1400156d8076427953401a6195bef65fba6471b4d35441d87f
font_01_sfnt_off000062e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E9 20392 bytes
SHA-256: 6baf332812119dba43b1d9ff4a9b4943faf6f1c9b93f5e30ac42c8dd413a7ccc

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