Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98d20dc451023b8…

MALICIOUS

PDF

44.6 KB Created: 2021-06-07 18:59:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 70fbe5599c6654910cb5b797c739264a SHA-1: f5607d939420082cb64dad7f3086352b6700a39d SHA-256: c98d20dc451023b851e56727ff46c1ea999f6b13550ba9f55adc80b0d6325450
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-risk heuristic firing for a game hack lure, directing users to a suspicious URL. The document body and embedded links reinforce this lure, aiming to trick users into visiting a malicious site. No scripts were extracted, but the PDF structure and linked URLs suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/robux-hack-little-obby-studios-game-hack PDF link annotation
    • https://reggieslockandkey.com/images/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/tiktok-free-movie-website_GM835599320.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-images_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/secret-skin-combination-get-free-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-system_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/hack-crack-for-coin-master-currency_GM406889139.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_off00005065.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5065 24816 bytes
SHA-256: 9bfb71812f34501a61c15b5c366e5f69236c1a279ba004537ad44077fe0dc212
font_01_sfnt_off0000898e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898E 18900 bytes
SHA-256: 2fd36d0051a7c815bcf58ac5bd3b967973c892cf0d0e0de48414608fa8e211b6

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