Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3fc337c0134a31b…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 05:24:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4d8470cbf2159f9fabea5bc12763e750 SHA-1: a095bdff9eaea9db3c7ce36936119f391534a0f6 SHA-256: d3fc337c0134a31b81e47913abb4d9655c0f24db70fe2f2574b6a01517af041c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free currency, directing users to the URL http://netcdn.tw/app/406889139/coin-master-free-spins-and-coins-link-today-game-hack. This heuristic, combined with the ML classifier, indicates a malicious intent to redirect users to potentially harmful content or phishing sites. No scripts were extracted from this sample.

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-spins-and-coins-link-today-game-hack PDF link annotation
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/rewards-robux_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/glitch-free-robux_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/simplysarc_GM479516143.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
stream_002_off0000334b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x334B 23336 bytes
SHA-256: a0c9b3b8d89d2107f6af20eba42924c260e55018b02c0b6aa57ea0a07a3adab2
font_01_sfnt_off00006820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6820 18696 bytes
SHA-256: a6f9ee4f31e630697269259bd77ba9f20f050f36d84dfdb118abf4b75a264952

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