Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9cbd709d651b67…

MALICIOUS

PDF

41.3 KB Created: 2021-05-01 16:27:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 875a33a378c86862c15bc7a46b43aec8 SHA-1: 1d987894584e8ecceb1615023439919b382a07c6 SHA-256: 8b9cbd709d651b673687476436e1dd248a00496d95cd5285ff1c760c65d8acad
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. 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 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/cheats-infinte-jump-roblox-fe2-game-hack PDF link annotation
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/download-roblox-free-windows-7.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-prison-life-gui-hacks-pastebin.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/beyblade-evolution-hack-script-roblox.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/greg-hacker-roblox-account.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/info-de-el-hacker-de-roblox.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-mobile-2021.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/apoculopse-rising-roblox-hack-script-spawning.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-piano-cheat.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-fortnite-island-royale-free.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-explosive.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_off0000432d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x432D 25728 bytes
SHA-256: ed0c85359f3f7d12cae8758a11427b87ce3267cc509c7c38926b9ed0f4543b2b
font_01_sfnt_off00007c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C69 19432 bytes
SHA-256: 8479b16d08e578dfef0bbcfc48cd63898bb5637c5b574b7ff2f84daae035f6aa