Malicious PDF — malware analysis report

Static analysis result for SHA-256 893ef13b8bac2869…

MALICIOUS

PDF

35.3 KB Created: 2021-06-23 09:04:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0de674c8ddcc147d05a2c57b895b1b8d SHA-1: 1816b26b78241a8f1397654312104ebc2a43d71d SHA-256: 893ef13b8bac28693fd4190be6b9413adfb171f937cce45cfd7262f813cfbf80
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.co/app/431946152/seitama-roblox-free-shop-t-schirts-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-promo-codes-december-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/level-coin_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/get-free-robux-no-inspect-fake_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-download_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-free-shavacadoo_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-girl-clothes-codes_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/cell-can-we-get-free-robux-dbz_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hack-roblox-autofarm_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
font_00_sfnt_off00002ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF3 23084 bytes
SHA-256: 69422f4a865623fb512f3b4c999623b2d62077b35a674b6a1dd77fdf42d84bea
font_01_sfnt_off000063e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E6 19476 bytes
SHA-256: 18373809566fde38865ea6cf22195343f74262b42491c534597d40a5f9f9bce9

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