Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38ee6b01ae3de25…

MALICIOUS

PDF

34.4 KB Created: 2021-06-30 13:36:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 652b399a6b8bcd4910c58368ff40c949 SHA-1: 4e3461d03e6d58a18b72f7e2992ddacae127f871 SHA-256: e38ee6b01ae3de25a2517221f91ed2335ec7b0a2550ab0a95f03d0c230df40d6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.co/app/431946152/free-robux-no-verification-easy-game-hack PDF link annotation
    • https://delsys.com.tw/image/data/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-robux-promocodes-no-hack-free_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-roblox-hacks-for-jailbreak_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/hacks-para-skywars-roblox-2021_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/get-free-robux-march-2021_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/ben-10-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-robux-claims_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/1x1x1x1-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-hack-client-deutsch_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/can-you-give-me-robux-for-free_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_off00002e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E83 22512 bytes
SHA-256: 9d935e7b778be60dc646b8e20f9981eb102812c9a972f690e76ef93dd3d75af7
font_01_sfnt_off000060b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B5 19256 bytes
SHA-256: a5e5fb61a00adf0777b8372c762975ea9048c06e03d87e3bec2760254fd77263

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