Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f99c0c7396a66a…

MALICIOUS

PDF

34.1 KB Created: 2021-06-30 12:51:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 83b825e5e26bf94f813d731a3c06b808 SHA-1: 3c42d503608c3bd68a038f3b1d47d265fdccd329 SHA-256: 24f99c0c7396a66a54de972b234b25a605f3d37419e3c86aa8d3add26b34ab92
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link disguised as a 'free generator / game hack' lure, which redirects to the URL http://netcdn.co/app/431946152/free-robux-free-no-survey-game-hack. This URL likely leads to a phishing or malware download page. The document body and embedded URLs reinforce this lure by mentioning 'Free Robux' and various game hacks, indicating a social engineering tactic to trick users into clicking the malicious link.

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/free-robux-free-no-survey-game-hack PDF link annotation
    • https://foc.vn/public/upload/files/roblox-ultimate-cheating-gui_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/one-piece-open-seas-hack-roblox_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/download-roblox-robux-hack-free_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-cheating-sex_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/is-roblox-virus-free_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-robux-without-verify-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-free-robux-offers_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/robux-gratis_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_off00002e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9F 22196 bytes
SHA-256: eacbcfb1432a0605edad80b24abad377c89d230b4565587a14852da607a37a7b
font_01_sfnt_off00006020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6020 19012 bytes
SHA-256: 4e4ee538de79ec7e4a2325d57c934275716f5f92a64f1321ae55620a5fe6760f