Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3bcea76b08d155e…

MALICIOUS

PDF

42.9 KB Created: 2021-05-13 14:19:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 96dc5341a71bc9d2fe29f41402e964c3 SHA-1: 68c0814b49b5096e79371b6b809fdd2753998ae3 SHA-256: e3bcea76b08d155ebfd947c0b5047f90de16e2e7ff344c04c4eec66ed563844a
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 0.9971

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 https://netcdn.xyz/app/431946152/free-robux-generator-without-verification-game-hack PDF link annotation
    • http://whiteyaknepal.com/userfiles/files/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/my-robux_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/robux-games_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/roblox36com-free-robux_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
stream_003_off00004ba1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA1 24356 bytes
SHA-256: 33ad1002ca11b6a7018018d3d2f4526e79fffa50428599fc30034fd9b73aaab7
font_01_sfnt_off00008372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8372 18964 bytes
SHA-256: 28b129fa50d9ed943d388e6dee4b9579dbddb2c3d46c54f90e146500d20faa97

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