Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0fa2011a78c843…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 21:40:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a569eec6e869a17f1eea0ef5ea3309d8 SHA-1: 3c39f28627eead1a50b0cdf4f059de778dddf328 SHA-256: 3f0fa2011a78c843213a701900095b859456d5b51af6c7502766308cc20dda4d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common social engineering tactic by luring users with the promise of 'free Robux accounts' and 'game hacks'. The embedded link directs to a malicious website, likely to host further malware or phishing content. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a malicious intent to redirect users to a harmful site.

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-accounts-game-hack PDF link annotation
    • http://www.med-aid.vn/ckfinder/userfiles/files/hcbb-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/fake-codes-to-enter-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/free-generator_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/free-code-for-call-of-duty-ww2-roblox_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/botton-complex-free-robux_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/roblox-jailbreak-free-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/free-game-pass-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/roblox-headless-horseman-free_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/how-to-hack-roblox-and-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.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_off000031e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E8 22672 bytes
SHA-256: 8ecc3a1726ebf8696e29b210dca5b56c5e2362985e2140916e7a0fa114b0537e
font_01_sfnt_off0000649d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649D 18820 bytes
SHA-256: 9247447a3c3765c463ad34d06656dabe45291e7d100ded84caf3f858f3985503