Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f26c8a6706490e…

MALICIOUS

PDF

35.7 KB Created: 2021-07-03 18:42:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 79cdf0901431654c2bf9a54a80691ae3 SHA-1: 72ee63cb2cd0be10f712383d9d5fd7779ada170f SHA-256: 82f26c8a6706490e5f7cd551df8c4993fa161eea983d83d424b869e9960a54c7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action lure related to 'free Robux' and game hacks, strongly indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the embedded URLs are the primary indicators of malicious intent, likely directing users to sites that host further malicious content or scams.

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/free-robux-games-that-actually-work-2021-game-hack PDF link annotation
    • http://niceviaapia.com.br/images/ckfinder/files/como-instalar-hacks-de-roblox-en-infinite-anime-2021_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-lost-hack_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-trader_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-no-human-verification-2021-or-survey-or-offers_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-on-pc-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-jailbreak-airdrop-hack_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/creator-of-slx-roblox-hack_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/no-human-verification-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-roblox-codes-not-used_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-hack-into-someones-roblox-account-2021-october_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-scam_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_off00002fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC2 22724 bytes
SHA-256: 8bf85a842fa6df640a6e218040ea15a580d1d4bd3b3617620c8a1da2ffde7a24
font_01_sfnt_off000062e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E2 20272 bytes
SHA-256: 3dcbb05b4dce0a2bab4a10db55923dcb732eb0f4a2e9bcb9735c66d658b8cabb