Malicious PDF — malware analysis report

Static analysis result for SHA-256 e51f4a1afd99d481…

MALICIOUS

PDF

44.0 KB Created: 2021-06-07 08:40:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 41525e987bf930ca0cbb62f30f168c6f SHA-1: c63a786a1ce00a85f437de7044bf790f8f2774a8 SHA-256: e51f4a1afd99d4818aba3d2a6472e788152238615669e79153f51ce2869e45d8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks, specifically referencing Roblox and Coin Master, directing users to a malicious URL. The document body and heuristics indicate a social engineering tactic to trick users into clicking the link, likely leading to a phishing site or malware download. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

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/free-roblox-models-game-hack PDF link annotation
    • http://medinup.pt/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-system_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-hack-2021-no-human-verification_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46C4 24748 bytes
SHA-256: 0367dbd10246c782322ec68a9dd841b1d01bd5b9c228b8be7a0a6213fcd1f86e
font_01_sfnt_off00007f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F81 2984 bytes
SHA-256: 889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc
font_02_sfnt_off000089ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AD 18316 bytes
SHA-256: edb79200e5beae14821c4fb0da5d54b947e55509ae4ac905c857c4517523c8f6

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