Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9f3e5913f952f3…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 12:05:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: aaa8799c30d57292c84d34f35170a910 SHA-1: 10e1e906aba90f18661928d71c54fe35a91d2d34 SHA-256: 4f9f3e5913f952f3967ffef968a20e63fb5468da577fd5307cd9f114d03247b1
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/spin-free-coin-master-game-hack PDF link annotation
    • https://digilib.darmajaya.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/roblox-devil_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/launcher-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/how-to-get-free-robux-2021-working-unpatched-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/roblox-assassin_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/how-to-hack-games-in-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-rebirth-codes-for-pet-simulator-2-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/roblox-paintball-hack-download_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_002_off00002f9d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F9D 22588 bytes
SHA-256: abfa32df7ec7366fbc071818912b8e94ef2b2cadda9b625f71f6ffd3b087d8b0
font_01_sfnt_off00006229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6229 18176 bytes
SHA-256: 8b68a35672d5b21ea29aeea640c198d2f03cb2d1fa451451c8ac02328cee2fb7

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