Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb2141f63140dba…

MALICIOUS

PDF

37.3 KB Created: 2021-07-03 18:59:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 29ea125c0adb4c44c7245b9b85a5a71f SHA-1: 31c8c5071cd3b96f631a73008be88ec24f17d18e SHA-256: fdb2141f63140dba92fd83c5ffadc6a31f97b1d6162f0be42fa08aa45ebec520
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/coin-master-free-spins-and-coins-2021-game-hack PDF link annotation
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-20212021_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/free-coloring-pages-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/roblox-free-robux-discord_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/roblox-hack-robux-420_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/hacks-master-coin_GM406889139.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/robux-claimer_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/hack-para-simulador-de-levantamento-de-peso-3-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/free-roblox-mod-menus_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/roblox-apocalypse-rising-hack_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_off0000382c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x382C 23652 bytes
SHA-256: bd77fd8ffa945ab990478722c58aec297c8a96560268c2e2392c7f06e0a71be4
font_01_sfnt_off00006dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBC 18752 bytes
SHA-256: e4aa4bc966ade2ebd198d7ae698a70c714723bf3d78331a5c03b975dc9a7ea7a

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