Malicious PDF — malware analysis report

Static analysis result for SHA-256 19188f8a014b6c83…

MALICIOUS

PDF

49.3 KB Created: 2021-06-07 09:07:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1ad5fbc2c8039513b098b5c0a8bea336 SHA-1: dc369a5e214c14928d7f92aa25257e840ff3d704 SHA-256: 19188f8a014b6c833ccd2f5cb26f2c5d3f1e2c1546212498ca1f06d986886a56
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 0.9871

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/claire-free-roblox-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/pokemon-go-free-xp_GM1094591345.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-donation_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-spins-on-coin-master_GM406889139.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_off000056a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x56A3 32120 bytes
SHA-256: 92de5efb329903c6b81cd31f7be92ecdc1fbf63d004b99014edb827ddcbfb8a6
font_01_sfnt_off00009e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8C 18296 bytes
SHA-256: 10f191860bd5be94e6b986a9eb938950962a48cc8c9bf95df67f88cccff80536

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