Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a42f03d7c35e99c…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 03:54:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1364d67db5bf49e4d3b95471214eedd6 SHA-1: d243d037fd9ce423ccc4aa6db9eee42bf42c917f SHA-256: 0a42f03d7c35e99c4d6a05655778fe8ba2aab5b0da9f67566f37eaa564b1f1e2
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/roblox-jailbreak-auto-arrest-hack-game-hack PDF link annotation
    • https://radiocaxias.com.br/portal/imagens/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-zethp_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/cheat-engine-keeps-getting-me-kicked-roblox_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/roiblox-free-robux-cards_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/check-cashed-v5-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/is-it-possible-to-hack-coin-master_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_off00002f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3B 22428 bytes
SHA-256: 1311727c1eac5a9548d611a0d0afe9ef9ffec44d672cc95ae52bb5963c965c37
font_01_sfnt_off00006148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 19188 bytes
SHA-256: 6aa8f8a677ca413974b2ba5094dc8642601a88c63d1451a9f497e2bff28a4ebc