Malicious PDF — malware analysis report

Static analysis result for SHA-256 89765d9422938ce4…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 09:54:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 28d64b487eb3198e21c3df574c5b43b3 SHA-1: b7011171a67e75a9d68a6b97efabf7d20596e882 SHA-256: 89765d9422938ce43ec8023686aec8fd6b1c0802559f61d2784f7aa9d6fc53cc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text referencing game hacks and free in-game currency, specifically targeting popular games like Coin Master and Roblox. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-gifts-game-hack, is flagged as a lure for a game hack redirector. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to direct the user to a malicious site for potential malware download or phishing.

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-free-gifts-game-hack PDF link annotation
    • http://libsmpn1balongpo.sch.id//repository/by-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/tiktok-views-free_GM835599320.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/games-on-roblox-that-vip-servers-are-free_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-robux-gift-cards-no-survey_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/legit-coin-master-hack_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_off00003100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3100 22484 bytes
SHA-256: 5cc9b1bd5ca6aef12c634b32daf0bd25f13892533b576add5ec1bb14189f2a90
font_01_sfnt_off000062fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FC 17996 bytes
SHA-256: 0554876b2ab95b57b2a8903cbabfbfa90e4f9f04422ab63317bc25d957b52972

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