Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c3537129c50faea…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 00:44:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f3e930f8395a751bb1dce538db21d3a9 SHA-1: 00396dba82ce05bc428ec08692a44fbebb6f4ee1 SHA-256: 4c3537129c50faea8e20c9761e6e439df1ab1629a5966fee9bf71d2b92311315
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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-hack-2021-no-human-verification-game-hack PDF link annotation
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/como-hackear-roblox-android_GM431946152.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification-on-computer_GM431946152.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/free-robux-cards-generator-2021_GM431946152.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/how-to-hack-stats-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/roblox-kidnap-hack_GM431946152.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://mtsnukotaagung.sch.id/__statics/gudangsoal/files/minecraft-wurst-hacked-client_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_off00003233.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3233 23136 bytes
SHA-256: cda9810ac29f5e2758d5ff5bda37e2d820b5a7df195e4ff0109a1a5a884f271f
font_01_sfnt_off0000665f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665F 18940 bytes
SHA-256: 8b81128e4d8c0a52c4f795b94b8e9f316ec6df4c85cd77aec984460d7bda85ab

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