Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f6199128ecabf7…

MALICIOUS

PDF

47.1 KB Created: 2021-05-10 23:33:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4dd68ea8a71e89ece3357ec581fbaeae SHA-1: b08131f433ec619c1561737deb8bd4c2e71ef2f1 SHA-256: 90f6199128ecabf7e8676e7790990c0371377a672ea99bb799a3ba30321c0f37
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed to trick users into clicking malicious links by presenting a fake CAPTCHA or human verification prompt, masquerading as a game hack generator. It contains numerous links to external PDF files, likely part of a link farm or SEO manipulation strategy, and also directs users to a known malicious redirector infrastructure. The primary lure appears to be related to 'free Robux' or game hacks, aiming to exploit user interest in such topics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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.xyz/app/431946152/roblox-games-that-give-you-free-robux-game-hack In PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-coin_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/robux-cheat_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/huskybuckscom-free-robux_GM431946152.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
font_00_sfnt_off000046e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46E5 27260 bytes
SHA-256: e44f910363816c4484398abf3706f0d36ce0a869120d0483373a7415626e72dc
font_01_sfnt_off000085f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F1 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9302 19240 bytes
SHA-256: af18d9cb6acc741702b59c78a5d378fdddaa2c6ad6fac2421576a1d1ac5dc213

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