Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8bf69f44c48978b…

MALICIOUS

PDF

34.3 KB Created: 2021-06-30 21:18:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 97dc7a217b2b7837e6863de18d770ed2 SHA-1: 4f20197e2951f35813a3e7bbd665fd7b6305a969 SHA-256: f8bf69f44c48978b292d5efb67318d9f85759cc594da85331dac8b619245d40e
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/how-to-get-free-money-in-roblox-adopt-me-game-hack PDF link annotation
    • https://delsys.com.tw/image/data/files/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/tycoon-money-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/slurp-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-hack-roblox-accounts-2021-inspect-element_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/drilling-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-wizard-pants-free_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-2021-robux_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_off00002e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E55 22148 bytes
SHA-256: 355329f4c55d60ed78812abc1b3a63939905db6df03dbb82c9641d0aad4d9e8b
font_01_sfnt_off00005f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F09 19644 bytes
SHA-256: 6bc44b74ab9d6137a63f817c391f8e1ece3d43ba59fae90de9e288ce62f3fa60

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