Malicious PDF — malware analysis report

Static analysis result for SHA-256 20824abe763eae8d…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 17:16:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 897e6c56f3c3fde2093f3a8100b31018 SHA-1: 263ee398b9ebc8619eac3fa002d223ee59ee728f SHA-256: 20824abe763eae8decc3160a510fb2d78fdae8a3e8f230f6cebcff313afea42e
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-free-spins-links-2021-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/counter-blox-roblox-offensive-wall-hacks-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-hacking-apps-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hack-roblox-a-telecharger-gratuitement_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-robux-2021-on-ipad_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-editable-invitation-template-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-toy-codes-unused-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-free-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-lumber-tycoon-2-cheat-engine-download-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/money-hack-urbis-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/urbx-club-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-song-id-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-stuff-on-roblox-catalog-on-ipad_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-lua-script-snow-resort-hack_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_off00003126.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3126 23132 bytes
SHA-256: 1251a107fbeff553ec585e21f1b6b78621a7edd0845e400b4348254b808a5341
font_01_sfnt_off00006549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6549 18748 bytes
SHA-256: 785b8830476a1dba2603225cf55ebb3d3433825858fb25e5612ad86a59b30773

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