Malicious PDF — malware analysis report

Static analysis result for SHA-256 cffd824e4f2bfde2…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 05:36:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 912dbc61bfe18a5c37c232554a970e6c SHA-1: 807deb47f9a98cd32d778343a4e9ad4158fd6c5e SHA-256: cffd824e4f2bfde2d2fa4cc8881a046e76607b4220d722fd933e4f8aadbf5459
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free items, directing users to the URL http://netcdn.tw/app/406889139/free-spins-from-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a potential for malicious redirection or download, aligning with common phishing and social engineering tactics. The ML classifier also flagged this PDF as malicious.

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/406889139/free-spins-from-coin-master-game-hack PDF link annotation
    • https://sensorcamera-tw.com/upload/files/pants-free-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-r7-hack-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/https-www-roblox-com-free-download_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/what-to-do-if-you-get-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/treasure-hunt-hack-roblox_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-cheat-engine-64-free-download_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/good-roblox-games-for-free_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-hack-sin-verificacion_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/www-roblox-free-rewards_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-shirts-free-on-roblox_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_off0000335b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x335B 23476 bytes
SHA-256: 54d9f66eea181716e58fef3b03771842d36bfe991cb1ad55c1e5a3632bba7577
font_01_sfnt_off00006877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6877 18432 bytes
SHA-256: 65a21218908e78d3b3e13bb6de659cda5883429e2feafaff43c4666217260e5f

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