Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9a18f28c47405d…

MALICIOUS

PDF

46.5 KB Created: 2021-06-09 16:10:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cbc8e212ffc539b3745f816e2b0c7a7a SHA-1: 9dfe79962921c31f8a02ab0e9e6931f603efe592 SHA-256: 9d9a18f28c47405d9b604ebd0f8a7278bda2e13643ad65ce829b163f7283bce3
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 0.9832

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 https://netcdn.tw/app/431946152/how-to-hack-roblox-accounts-passwords-2021-game-hack PDF link annotation
    • http://lib3tell.stptrisakti.net/repository/donate-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/master-coin-free_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/pokemon-go-free-and-pokeball-plus_GM1094591345.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/hacks-for-mad-city-roblox-immortality_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/www-robux-com_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-games-com-free_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
stream_004_off00005008.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5008 29164 bytes
SHA-256: 6ec0801566eed04ff1a9608428c51ab7ecda6e40b31b8119b343984323180130
font_01_sfnt_off00008fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEF 19320 bytes
SHA-256: 03c727be2ab1f0e579d85015c38ad6ed749fb08f69900a53b9deacb29b8bce2f

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