Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac67b6872f7f2d17…

MALICIOUS

PDF

33.1 KB Created: 2021-07-04 21:01:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1cc551aafc9f90f803259d25d9933f52 SHA-1: 69f0ecec68c98a7e94b9d908753d9e8e11771511 SHA-256: ac67b6872f7f2d17bf3facd2179ae8438892c2ec1ba665c48d0984384212f75d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-risk heuristic indicating it links to a 'free generator / game hack' redirector, specifically pointing to a URL associated with Minecraft. This lure, combined with the presence of embedded URLs and the ML classifier's high confidence, suggests the document is designed to trick users into visiting a malicious site. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/minecraft-free-trial-game-hack PDF link annotation
    • https://elibrary.ikhac.ac.id/repository/free-robux-script-pastebin-10-29-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/i-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-do-you-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/getrobux-me-roblox-online-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hack-denisdaily-roblox-account_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hack-para-jailbreak-roblox-september-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-shirts-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/secret-robux-hack-subscribe-to-make-it-works_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-buy-obby-link-in-description_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-join-roblox-youtubers-games-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/666-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/yammy-roblox-hacks_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_off00002fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCF 21812 bytes
SHA-256: acf2f435b2c5aa5cad70d555ac7e39c315aad72a70fb038038df3601f288fa5b
font_01_sfnt_off00005fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC5 17928 bytes
SHA-256: 0792cf34759639c12fb16c68b09c197272744776153a85f812a9a9f109c9c07c

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