Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbafbafd5aa99ece…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 15:45:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f61480ebbba0e56fde4b477e0c15b0e0 SHA-1: d7acc23dec1d0014b1812883baefb6a9dd90e022 SHA-256: dbafbafd5aa99ecef61a215e344519a750e8e04d3a780194c8ffd2528da71f05
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-daily-spins-game-hack PDF link annotation
    • https://delsys.com.tw/image/data/files/roblox-pyramids-strucid-beta-free-skin_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-robux-no-human-verification-no-offers_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-roblox-carf_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-roblox-sun-glasses_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/estan-hackeando-roblox_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-robux-without-getting-banned_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/hack-full-throttle-roblox_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/guuddinfo-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-hack-2021-for-all-games_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/deep-ocean-roblox-hack_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-hack-2021-without-human-verification_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_off00003264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3264 22428 bytes
SHA-256: bbf87a7e2a61ed1126621796d4a485af9ff34537a9183544d17cbaa7abd4cc1e
font_01_sfnt_off0000641f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641F 18432 bytes
SHA-256: 545b5cad0eee8d3f21d342a92ff3ef40fb5b0a804354e3755a26420c72329253

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