Malicious PDF — malware analysis report

Static analysis result for SHA-256 d77617ee5fdd1306…

MALICIOUS

PDF

34.9 KB Created: 2021-07-09 14:11:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 52f187d2827e3d670fe0ea3bef8e0a52 SHA-1: ea5c695c6e1b66e623a6f6fd8597105731c79b26 SHA-256: d77617ee5fdd13061e6ecd7631140f722fdcaa306bc5502abfc0deab36e24b53
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.tw/app/406889139/free-coins-coin-master-2021-game-hack PDF link annotation
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/hack-cuentas-gratis-en-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/how-to-use-script-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/roblox-glitches-and-cheats-for-lumber-tycoon_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/android-cheating-tools-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-minecraft-alt-generator_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
font_00_sfnt_off00003294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3294 22776 bytes
SHA-256: 381e4f552bc08e0450b0d00c44d146963a6790a5099a66cdbe044d11967c276c
font_01_sfnt_off0000657e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657E 18400 bytes
SHA-256: 2a3e6040a3b782e95a9624477cdba266f2d22bc61ba2df799c05fa910d77e25c

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