Malicious PDF — malware analysis report

Static analysis result for SHA-256 40696fada29abeca…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 14:21:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 492d7f091dfee055406d4d70704895bb SHA-1: 542d203d74ba37ff4cc3895e5d649872c3b70e9e SHA-256: 40696fada29abeca97927557ffeeb010b3d190dd923e073bd190d8c7e8da2182
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/freegames911com-coinmastertipsandcheats2021freecoinsandspins-game-hack PDF link annotation
    • http://lib.fekon.untad.ac.id/repository/roblox-robuxfor-free_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/hack-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/rbx-earn_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/grand-opening-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-robux-for-free-simple-steps_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/combo-with-free-hats-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-computer-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-on-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-ha-sido-hackeado-por-john-doe_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/john-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-royale-high-cheats-for-diamonds-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/obby-games-on-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-haiir-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-snake-eyes-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-promo-codes-list-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/hack-pia-para-roblox_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_off000031c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C0 22740 bytes
SHA-256: 44602fd3679bf70bbd12e9965b570af56cc3b93ff888396c6824696d1acae66d
font_01_sfnt_off000064c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C4 19340 bytes
SHA-256: 336cd4fe356f1d557bb7c81c630fbec16c59259e54990c4d97f24f313c3c71ee

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