Malicious PDF — malware analysis report

Static analysis result for SHA-256 6455d6930d7eaf54…

MALICIOUS

PDF

35.8 KB Created: 2021-07-07 10:32:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 156cdb3036cf4293200bfc2c8f487cd9 SHA-1: 9ffb01872d8c312e14844957a1164c961faf519d SHA-256: 6455d6930d7eaf54008aad885fba3d996b59f95e95665a1c214ab59a90b6d76b
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/406889139/2021-free-spins-coin-master-game-hack PDF link annotation
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/free-robux-using-inspect_GM431946152.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/free-robux-no-saving_GM431946152.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/www-free-robux-come_GM431946152.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/roblox-robux-game-cheat_GM431946152.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtspersissindang.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_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_002_off00003356.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3356 23424 bytes
SHA-256: a42e7f9601916f10a6184db7bb8b94bd80d68a74512356e4b82d8a6501bd2883
font_01_sfnt_off00006856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6856 18576 bytes
SHA-256: e072abe3ddea7348b6ad42f3e58cf0336d8cc97c01862fb082958ccb0059bec3

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