Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b84bbcf6d0ec50e…

MALICIOUS

PDF

45.1 KB Created: 2021-05-17 12:09:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 058b8ea6a399d191a81900b9532651fb SHA-1: 1619b527d2ec5ca0a40329203e53d594b543e041 SHA-256: 6b84bbcf6d0ec50e6375d304004dfa8974d41b48defaf941ae4f1f653f3c9414
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 0.9621

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/earn-robux-com-game-hack PDF link annotation
    • http://www.makoto.su/images/coinmaster_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/coins-master_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://www.makoto.su/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/robux-page_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.makoto.su/images/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004764.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4764 26668 bytes
SHA-256: 2b2612238172c72b8c9a945897cfbe51ddb05ba19fbc0cb9b707574ac4cd2219
font_01_sfnt_off000083b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B6 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D67 18340 bytes
SHA-256: 73022d66eecee4efafff23453c98f7b2dd1a6a21145ea515066a8a3f3a15b160

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