Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f6e0ef05a7371a7…

MALICIOUS

PDF

50.1 KB Created: 2021-06-11 05:14:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2cf5618415b5d261f99ba60b150be3b5 SHA-1: 0c31542a051a9190e84e462496596a23d8d9fe0a SHA-256: 3f6e0ef05a7371a7ef160fcde31c2ee80692ec5e2b4c522eb9e0d7884c1d06b2
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 0.9789

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/games-with-free-segway-roblox-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/where-in-roblox-can-i-find-free-gems_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-hack-2021-apk_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-items-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-ben-10-universal-showdown-cheats_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-admin-roblox-commende_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/como-hackear-a-gente-en-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52DB 27132 bytes
SHA-256: 697367ab596899283f09e6ac5805a809e89e5f9b52e6ddc27353fb310feb6088
font_01_sfnt_off00009029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9029 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3B 19656 bytes
SHA-256: 4741b974015a465dfbf02f709e2c0dd4931cb5ea9456e6cd7eaf28c90b6723cb

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