Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b81b207f46f1ed…

MALICIOUS

PDF

44.1 KB Created: 2021-06-04 01:03:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f815318ca1d36f5d0915d330a3b835ac SHA-1: b283bd9da11d2f265a513d9ed5277d6813015a24 SHA-256: 06b81b207f46f1ed9b50d29c061e705f998671fae12cb81c672ea5b0452edd0d
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 0.9865

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.online/app/431946152/whats-robux-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/robux-for-offers_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000506f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x506F 24500 bytes
SHA-256: aaec3f41f5b924551e9a8355e239aff8dd64a8167c0cadbd8b98bdf5506d59b6
font_01_sfnt_off000088ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AD 18548 bytes
SHA-256: 0f5696d834c6e2d92691ea88add56d1ebde531c0848fc2381b30e525a3a87f9e

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