Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c1f2bf6bab2179…

MALICIOUS

PDF

52.6 KB Created: 2021-05-17 13:12:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d943776dc6a750d40ff6a7c74eca73b7 SHA-1: 481bbe6bae729a1371b1afaa51bafac279bb84d9 SHA-256: 54c1f2bf6bab2179411014dc46f714b08d530655578c7df8cf7fa1d351379e7a
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 0.9218

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.xyz/app/431946152/free-admin-roblox-game-hack PDF link annotation
    • http://mklista.ru/images/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://mklista.ru/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://mklista.ru/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://mklista.ru/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://mklista.ru/images/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/coin-master-hack-apk-july-29_GM406889139.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_003_off000049f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F8 24792 bytes
SHA-256: 07951b51098e89bc33ebfd489325ca627fb1a7351bcc5ba751b03cab8b72de68
font_01_sfnt_off0000832d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832D 12800 bytes
SHA-256: db399d969d9309c9c38cb6e3c43aa83c06d227a5470715de93176d1df1e6747d
font_02_sfnt_off0000ab0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB0A 18504 bytes
SHA-256: 830d3dec1a52b5677d0ce8f7274f803060246143ae3edd9314b7ddd4a581007c