Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4f7d9088824bf91…

MALICIOUS

PDF

33.0 KB Created: 2021-07-04 08:45:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3f83d8d654a65b8cdd0e21b63eb76cdd SHA-1: d524417f4c564163707b00c1521ee933945931fe SHA-256: f4f7d9088824bf91d7165d20623e7af2307275fe9a46a5ee314b4c6f99d8ecbd
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/roblox-ban-game-hack In PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-roblox-womens-face_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/hack-robux_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-get-tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/robux-game_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-2021-how-to-cheat-in-fencing_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/cheat-engine-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/robux-hack-inspeccionar_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-hack-mod-game-download_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_off00002ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CCD 21908 bytes
SHA-256: f3875300aac652793879e99608f838bb05272d9eea3353939635b774f23eb39a
font_01_sfnt_off00005d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4E 18484 bytes
SHA-256: 9d5f4934e3fc36eeac5b6b5332195d377a7f7204d7b6b5eef7fa0f4bf1a7998e