Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8aba23b06aac5fa…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 07:25:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c7bd24d00732a70dd0fdca19fdb7feb2 SHA-1: 271a15898876f656226aa93c40e6e4eefbdc07d8 SHA-256: e8aba23b06aac5fa3639ae33f524ba0cdf792d6af34a9a96e20dd344929624c4
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are SEO-optimized to appear as legitimate resources for game hacks and free currency. The primary lure is to trick users into visiting these sites, which likely host further malicious content or phishing attempts. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed for traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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/431946152/how-to-hack-in-arsenal-game-hack PDF link annotation
    • http://balitgetas.co.id/pustaka/repository/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/roblox-free-codes-2021_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/robux-claimer_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/roblox-hack-character_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/how-to-hack-roblox-money-on-ipad_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-robux-cript-tamper-monkey_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/coin-master-free-spins-hack-apk-download_GM406889139.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_off00003013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3013 21872 bytes
SHA-256: e707e1e6b9ad24af82eb2b00a9d27c16c67a1041154499169447812ec4431ded
font_01_sfnt_off00006052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6052 18452 bytes
SHA-256: e830d4d2850352ff681c802b50bfdb69e36cdf0dd9a2fca6f972fc848603048f

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