Malicious PDF — malware analysis report

Static analysis result for SHA-256 4711943c25a65676…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 11:32:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f14a2f17cb0eabd0061195aa719e4794 SHA-1: b4b12493f59d890e67cc1c678512038509e95ef5 SHA-256: 4711943c25a6567642a1efe9fe66463c6adb81b7f117d98ff4c651b0b39b47af
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a malicious redirector, that lure users to websites offering free game hacks or generators. The primary malicious link, http://netcdn.tw/app/406889139/freespinandcoin-game-hack, is designed to lead users to potentially harmful content. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/406889139/freespinandcoin-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hacks-para-traspasar-paredes-en-ccualquier-juego-de-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-car-glitch-in-roblox-vehicle-sim_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-hacking-lua-c-script_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/download-app-hack-roblox_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_off000031c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C0 23036 bytes
SHA-256: edf6b9269dce068649ecf33da97f2aefecbf978b680be030a57685e246eb1329
font_01_sfnt_off0000658e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658E 18244 bytes
SHA-256: 19494bed36003fadbe02431e250c62ef1698fa422030438aed600d934fd3a9e1