Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b76acbbb5a6877…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 02:47:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 956ce7903900047dd47eba49f0e45353 SHA-1: d9d9f4c56ad95290399cc191e0a52ba06f93ae60 SHA-256: 12b76acbbb5a687717beb305f1fb4fde03a7ba335604d91b6c1ee8d5aa7f073f
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.tw/app/406889139/coin-master-free-spinv1-0apkpure-com-apk-game-hack PDF link annotation
    • http://www.sovtigaz.ru/f/files/roblox-hack-for-fly_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/cardcode-pw-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/99-999-999-999-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-free-cards-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-robux-fast-and-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-generator_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-change-roblox-game-name-with-hacks_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-hack-in-roblox-easy_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-do-i-get-robux-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/minecraft-free-download-windows-10_GM479516143.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_off00002f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F38 22852 bytes
SHA-256: 6d97a2f04d3f91ceb172c7cd13391b3b1988befc5c492342c256698d5ae8dfc4
font_01_sfnt_off0000629a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629A 19136 bytes
SHA-256: f0371b22d7bcfeb2aedd046ce053aa9d97e14ae3564301ad07a73cd6548e3f70

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