Malicious PDF — malware analysis report

Static analysis result for SHA-256 0970f5ddf3be9cc0…

MALICIOUS

PDF

48.3 KB Created: 2021-06-08 23:35:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 166418fd8fe7eecbd1e0661d17afb9ec SHA-1: 94e626e3fab543f6fd3ac539dfdb6236ebd832aa SHA-256: 0970f5ddf3be9cc0080b3c04a562bdb5b83ba8eed7dee59d6e15b869b2e55952
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 0.9796

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/how-get-free-robux-with-codes-game-hack PDF link annotation
    • http://lib.akper17.ac.id/repository/easy-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000522e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522E 26136 bytes
SHA-256: 8b7a88f30427806d9f63c03dfde82f3b04844cee4b832e9c4d70ae1171a85a3a
font_01_sfnt_off00008e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0E 2896 bytes
SHA-256: 0f10adbf105d053971010bc1f17c4dd55814d599674c84f75a6eb4cb46a9c89b
font_02_sfnt_off00009805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9805 18940 bytes
SHA-256: d728ea9bf912733d59c0bc6a05cd913171c3a7089ab0ad407bb6deca8f315483

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