Malicious PDF — malware analysis report

Static analysis result for SHA-256 685f172be310bb4f…

MALICIOUS

PDF

44.7 KB Created: 2021-05-11 15:04:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 240039af377c961d3aedcf0bcfce7058 SHA-1: d53bf4c9169afaf60dc94863afc93b2d89adfb2d SHA-256: 685f172be310bb4f5f94b8c35578743e3faa1ce6c0418dfc7e401cf2eeee4b96
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 0.9632

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/406889139/coin-master-hack-spin-generator-game-hack PDF link annotation
    • http://evro-okna.net/images/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://evro-okna.net/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://evro-okna.net/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://evro-okna.net/images/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://evro-okna.net/images/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://evro-okna.net/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://evro-okna.net/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://evro-okna.net/images/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://evro-okna.net/images/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://evro-okna.net/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://evro-okna.net/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://evro-okna.net/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://evro-okna.net/images/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://evro-okna.net/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://evro-okna.net/images/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://evro-okna.net/images/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://evro-okna.net/images/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://evro-okna.net/images/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://evro-okna.net/images/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://evro-okna.net/images/coin-master-free-daily-spins-link_GM406889139.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_off00004a7f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7F 24832 bytes
SHA-256: 95fd4daed667748e9a5d204392d96a55346df91b2b006aba227bc8e893c95088
font_01_sfnt_off000083b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B4 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D54 17892 bytes
SHA-256: fb469e3bf9035f41b30956febb327ba05298378f8328666f03cb40abfa022080

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