Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e327d76833b3849…

MALICIOUS

PDF

47.1 KB Created: 2021-06-09 08:18:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4e9cfcf7f7ef02acdbd43d0254bd812f SHA-1: 5792b868ded4b5e8882c7cb746109263b0b0e1bd SHA-256: 8e327d76833b384901d1ef8cd74f3ca829f9ccbe3af3d76a37f387ebebf4149a
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 0.9832

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.tw/app/431946152/roblox-jaubreak-hack-script-auto-rob-game-hack PDF link annotation
    • http://library.ulb.ac.id//repository/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-for-cumputer_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/r67-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/pubg-uc-xtrcom_GM1330123889.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-minecraft-servers-to-join_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
stream_004_off0000552e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x552E 27420 bytes
SHA-256: 0356c15c4acaf4cfce73cbf20a06ea729d11df1dbf493448d7ae466d6b287952
font_01_sfnt_off000093e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E8 18888 bytes
SHA-256: 6e3c37dfde3460480ea8b1f2779f8cb2ea7447713f6da3aed7345e3fcff56d89

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