Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff3682271d204b7…

MALICIOUS

PDF

34.2 KB Created: 2021-06-22 16:11:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aa91ac7c26c56e7b14822fcd6a4a699b SHA-1: 1321bf4842634db349d5fe26d95ab9b4cbb3fbaa SHA-256: 8ff3682271d204b7a0087afc320569ab0d3b6bfefccdbd9d67b88370d8f9a7e5
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-hack-de-dragon-ball-rage-game-hack PDF link annotation
    • https://sensorcamera-tw.com/upload/files/roblox-studio-free_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-cartoon-maker-online-roblox_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-lumber-tycoon-2-money-hack-download_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/gift-card-generator-hack-robux-codes-hot_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_off00003051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3051 22032 bytes
SHA-256: 03e43ffe90489293b05a0e586005e1e9e7381b1c7982ea8d51a035e63eb30c05
font_01_sfnt_off00006130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6130 18824 bytes
SHA-256: e6c82398d13ee8513f13704d32ebc1822929dfd96acc31b5bf094345ce3072d7

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