Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b1f268f3ef9d5d…

MALICIOUS

PDF

44.4 KB Created: 2021-06-09 03:58:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d5340fbce038f89810701cb9c499c0ee SHA-1: ab7380b1838edc71091eb0a141ae7960bf6fdc13 SHA-256: e6b1f268f3ef9d5d7a2fa73eab0560bc632c8b6b7c23d1db6f5647a2d50ce1dd
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 0.9865

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/denis-free-robux-obby-omg-game-hack PDF link annotation
    • http://perpus.wdh.ac.id//repository/make-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/frobux-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-robux-on-mobile_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_off00005020.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5020 24656 bytes
SHA-256: 2f975f7ce0b8272b0db4127db13c235967e2823476f95b2bf4ff5b40ca4e522d
font_01_sfnt_off000088cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88CF 19032 bytes
SHA-256: cbebfcf43ca0918cd5db226635944d0123e1f360a6ff2d36a95bcb9a18693869

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