Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc3369795173179…

MALICIOUS

PDF

33.2 KB Created: 2021-07-08 18:58:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a7a0f6741641ac0d82536304f9869956 SHA-1: 4771556b3be8b267547ff317ea6f39f22ca7fee4 SHA-256: 6fc3369795173179056e1c633689b7d19f20e9291ee84a6e20b3f7e9d118203c
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/431946152/robux-apk-game-hack PDF link annotation
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/robuxian-com-free-robux-code_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/roblox-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-to-get-free-robux-on-roblox-on-ipad-2021_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/robeats-hack-roblox_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/zombierule1-this-hack-gets-you-thousands-of-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-cool-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-roblox-stricid-codes_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-gamepasses-roblox-script_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-hack-iphone_GM406889139.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_off00002e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0B 21524 bytes
SHA-256: 76854e86bca0896a9027c4f2c942638e86c1b0853f18e516e1610ea86fba6f4b
font_01_sfnt_off00005d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1F 18896 bytes
SHA-256: d6fe5a9ee6cd38a3f7fd000d6a8081505603ed5c53f6d64f924d6cd3550e503f