Malicious PDF — malware analysis report

Static analysis result for SHA-256 100d2b8e4e6a2f40…

MALICIOUS

PDF

35.1 KB Created: 2021-07-09 12:01:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c9a5280e82c6a48ddbc69df244a8ac19 SHA-1: 212f5691d29c0d56882fbdd55fa9d38b630854c6 SHA-256: 100d2b8e4e6a2f40f45e65bd80b0d0261cc82ee0ce6779832d92830e642d3fe1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a game hack lure to entice users to click on external links. The primary link, http://netcdn.tw/app/431946152/roblox-phantom-forces-credit-hack-2021-game-hack, is identified as a high-risk redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a malicious workflow, likely involving redirection to phishing or malware download sites.

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/roblox-phantom-forces-credit-hack-2021-game-hack PDF link annotation
    • https://amiranet.com.br/files/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-fine-addresses-in-cheat-engine-for-roblox_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-roblox-app_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/hack-robux-new-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-roblox-wing-skins_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/roblox-hack-gamepass_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_off0000308b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308B 22108 bytes
SHA-256: 464d8fff4ad8190ebb6abcf5cfc69ee48dc897af62ed40a57837ac93b48da892
font_01_sfnt_off0000618f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618F 20012 bytes
SHA-256: 15d8d12e559c2961054f7a086d200f7ccffe6380994efd5dab766bfbd71e74b4