Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb930e71a4cdbfb6…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 17:54:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d6fb169e2faa9d423ddcc8f34e9778c9 SHA-1: a533f0b81c18b8ae0e7a4a5ebd5d7138593e28af SHA-256: fb930e71a4cdbfb60179b1ef501ffe76ba108545b6c85379d04de7fe3028ab26
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/431946152/free-printable-roblox-coloring-pages-game-hack PDF link annotation
    • https://mubaohiemasia.com/ckfinder/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/roblox-controversy_GM431946152.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/cm-free-spins_GM406889139.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/get-robux-today_GM431946152.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://mubaohiemasia.com/ckfinder/userfiles/files/blogger-coin-master-free-spins_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_off0000300f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300F 21960 bytes
SHA-256: bd03367a1d8c839a12f715c36a5459d72ae7cb1a20b47900614e04b997bf21dd
font_01_sfnt_off000060da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DA 19028 bytes
SHA-256: 5f635714ffc1e06cc3adbe1f419b1afc1218117c26e9831e08745cd6b74bac39

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