Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a4cc76b8eb1deae…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 06:08:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5cf2623c006c3d66be577fe5c2cb461c SHA-1: fae4382aeafc1fcc7bb1742603a0b17bba6c2f36 SHA-256: 7a4cc76b8eb1deae749d7348635e43e6322bd34fcff720f800b6990e562a072d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on domains associated with link farms and SEO manipulation. The primary lure appears to be 'game hacks' and 'free generators' for popular games like Minecraft and Roblox. While no scripts were explicitly extracted, the PDF structure and the high number of external links suggest a malicious intent to redirect users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.tw/app/479516143/how-to-get-minecraft-for-free-on-android-device-game-hack PDF link annotation
    • http://lib.vipklh.ru/repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-hack-badges-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-2021-no-having-to-get-anything_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/draw-it-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/get-roblox-items-free-working-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-cars-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-abs-free_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-infinity-rpg-cheat-codes_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/arcade-tycoon-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/fast-robux-hack_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_off0000302a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302A 22768 bytes
SHA-256: d92eae0594effdd3cfcb467fe96b57dbbb16e6a9db8969729b59245002edb7ac
font_01_sfnt_off00006333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6333 18616 bytes
SHA-256: 54a0671c03b3cf1f3bb53e1ad2af697eab54dc928557e8ed7be860ed48ff46e3

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