Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc01b8aa773f554f…

MALICIOUS

PDF

40.7 KB Created: 2021-04-27 22:29:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 300721683e6b28122acccf0dfae62feb SHA-1: c8bb57060ed39d3c49ce8001b51bb527e1abd141 SHA-256: dc01b8aa773f554f737ac9e0c0aa6229dfd7dd0e3452a03af92016014812b146
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/hack-on-roblox-free-robux-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/roblox-super-power-training-simulator-hack-script.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-use-cheats-on-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-pubg-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/gratis-hack-royale-hihg-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/up-my-age-on-roblox-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-things-on-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-awards.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-cheat-engine-for-robux-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hacker-egg-2021-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-korblox-deathspeaker-free.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_off000040a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40A2 26008 bytes
SHA-256: ccb1fab4e7058afc9a7f508f50989a6af7b4ca467c4c356ae688bee6975ca571
font_01_sfnt_off00007c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8C 18488 bytes
SHA-256: 7e2ed786b8b92fa021d6ca516ea41dd5364790dea90365a0040ab2bf5f300d7c

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