Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfbb1be5114650d7…

MALICIOUS

PDF

42.4 KB Created: 2021-04-24 19:42:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 85ea92ee4f8db292a242858c49ad10a6 SHA-1: 59af4f714225cb15e9f4a67f71ba109f69dd8598 SHA-256: bfbb1be5114650d72a6ea2c67127fe4de9449cfa87fe0a1628a2dd870a930bd4
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/roblox-real-hack-robux-real-encrypted-game-hack PDF link annotation
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-cheat-in-roblox-yousin-the-console.pdfIn PDF document text
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/roblox-free-username-change.pdfIn PDF document text
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-change-your-clothes-in-roblox-for-free.pdfIn PDF document text
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/roblox-sharkbite-free-boats-script.pdfIn PDF document text
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/hack-de-roblox-dinero-rozitizens.pdfIn PDF document text
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/counter-blocks-roblox-offensive-hacks-unknowncheats.pdfIn PDF document text
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/free-roblox-hack-no-survey-or-download.pdfIn PDF document text
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/free-script-executor-lvl-7-roblox-2021.pdfIn PDF document text
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/free-roblox-items-2021.pdfIn PDF document text
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/funny-roblox-hacker-names.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
font_00_sfnt_off00004446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4446 27240 bytes
SHA-256: 55ec2253d1f52581a9bc8398ecffdd6b16f2947db9cdd46a7649d41ac6531237
font_01_sfnt_off000081ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81FF 18956 bytes
SHA-256: f7a0ab6f5b5555f2ac13fee6c40bb428df3a34744c73b0051c4efed30ef95712

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