Malicious PDF — malware analysis report

Static analysis result for SHA-256 38fd93d7cc4e0bab…

MALICIOUS

PDF

48.2 KB Created: 2021-06-09 17:15:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ef5b1cb8d174b92397d0ef56d30a41a5 SHA-1: 149ab4f4e648fb0867c80be6f412f9523b909b49 SHA-256: 38fd93d7cc4e0bab5f2118bda31f3b792ee9d508af024dc8b625842846fae1fe
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/how-to-hack-roblox-lumber-tycoon-2-with-cheat-engine-game-hack PDF link annotation
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/roblox-how-to-execute-scripts-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/roblox-cheat-engine-august_GM431946152.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/picture-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.miriyadlussholihien.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator-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_004_off00005556.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5556 28216 bytes
SHA-256: 72faca10d1d81bdeb80015f3c1a020cc858e683864b814b333dec799f91e9c1f
font_01_sfnt_off00009554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9554 19928 bytes
SHA-256: d301af3ece88cbadf9f98255c1867cc9c179a3f34144bbea95070e0a8efcffd4

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