Malicious PDF — malware analysis report

Static analysis result for SHA-256 b20eea90a1eb09cd…

MALICIOUS

PDF

31.0 KB Created: 2021-06-27 11:01:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7edc1c8018b124ff89872a464510b911 SHA-1: 14a9c82b723d8c8359a0f804bb7628b86ded023d SHA-256: b20eea90a1eb09cddbe1aee76ede460ccb512d6145d816d17774630eb8b594ee
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 0.9774

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.co/app/431946152/free-robux-by-robuxian-game-hack PDF link annotation
    • http://www.tdbaska.hr/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://www.tdbaska.hr/files/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.tdbaska.hr/files/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/get-roblox-items-free-working-2021_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.tdbaska.hr/files/i-was-hacked-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/heroes-online-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-robux-may-2021_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-robux-for-humans_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/rbl-gg-free-robux_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_off000027c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27C3 20768 bytes
SHA-256: 35a7a2dfc71e4d0943922f8c5d118235cd11b7d68254ac3a0fc03251f1621ad3
font_01_sfnt_off00005469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5469 19016 bytes
SHA-256: efb49514e82f4793a9ff299c885132947e82649e2c9fe1ac030a06993fb15df7

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