Malicious PDF — malware analysis report

Static analysis result for SHA-256 41cb0468d0ec6a8b…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 10:35:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5344521d6ab69cd768763bff6c6619e9 SHA-1: c895a5349ab3ce6d683409aeb8add3c20ec03d9e SHA-256: 41cb0468d0ec6a8b21433383901afdee98109f1e4c437ce89f6146cf7c1760b7
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-tricks-and-hacks-game-hack PDF link annotation
    • https://vieclamjapan.com/upload/files/roblox-how-to-speed-hack-not-patched_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-hack-build-tools_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-hack-csgo_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/spin-coin_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/fps-free-games-best-on-roblox-2021_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_off00002ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF5 22148 bytes
SHA-256: 5b627e94de2035da5585e47adc4bdbebeba68b5325f2e706e4d2a1735798c040
font_01_sfnt_off00006110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6110 18180 bytes
SHA-256: dfecb5597a099b299edbba7e97364fb818f89e74cd78aaeeffd34e29c79fe281

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