Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d6937c5e502f9f…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 00:50:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f4ad7f0d790730675e5fc574a5e4b84f SHA-1: 7195559facb469b7ecedeefa214224d7f1f4e3c1 SHA-256: 20d6937c5e502f9f768073d8bcf6c68999f8cfe827d99ac2b905dc4d01f4df4d
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/431946152/roblox-no-download-hack-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-hack-generator-download_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/pokemon-go-free-promo-codes-2021_GM1094591345.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/tiktok-free-coins-apk_GM835599320.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-ultimate-gamer-365_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-116-apk-download_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
font_00_sfnt_off00002eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EAA 22092 bytes
SHA-256: df850a8cc6f4ce9c699af6e872ad4d1f7010b0658bfa21b8afe394cd014148f0
font_01_sfnt_off00005fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBA 19160 bytes
SHA-256: 38656f57ea632c5ae9aff0990ef32f47b4b1b394188ef10efa33bf9d5ff74d0d

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