Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11436ad4439e597…

MALICIOUS

PDF

40.9 KB Created: 2021-04-25 17:04:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 305b8e21be478dd5317db343b2a1ab52 SHA-1: 6b3afbf7e314f0131b84e6b583fa7cec249f2046 SHA-256: e11436ad4439e5970c3a8fc0f2034a8e8875db94eaf408dab956f37cfb0a111e
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 0.9941

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/how-to-hack-any-account-on-roblox-2021-game-hack PDF link annotation
    • https://sitecontabil.com.br/ckfinder/userfiles/files/hacked-noob-roblox.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-get-free-tix-on-roblox-with-cheat-engine.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/best-roblox-free-clothes.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-get-a-free-gift-card-on-roblox.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-hack-roblox-players-acounts.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/roblox-robux-online-hack-2021.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/hacks-for-roblox-ninja-legends.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/robux-hack-a-scam.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/roblox-pizza-hack.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/commands-for-free-admin-roblox.pdfIn PDF document text
    • https://freerobux.cyouIn 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_off00004170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4170 25956 bytes
SHA-256: 8778484b15c0f641373f659c8ff0057157915310cdb6174ec6d3cedca173cd90
font_01_sfnt_off00007b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B23 19172 bytes
SHA-256: 0a7e104d5ecfc95001c2fec9af84766da75c2f23ece79c6ff95580c56c9070bb

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