Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6997ede9e9b0995…

MALICIOUS

PDF

37.1 KB Created: 2021-07-05 00:49:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2130a985d936871ce919595d901a84f5 SHA-1: 245de3d00c811ffe30269cdc6cc278d637049167 SHA-256: d6997ede9e9b09955bfa0370e2db5a58a6fbc11d2719bfbc35bcd6de2c516aa2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to websites offering game hacks and free in-game currency, a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or social engineering attack, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/earn-roblox-game-hack PDF link annotation
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/free-roblox-accounts-with-obc-and-robux-2021_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-xbox-one_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/app-for-free-robux_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/roblox-bc-for-free_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/how-to-get-roblox-toy-codes-for-free_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/roblox-free-game-app_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/find-people-in-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/tiktok-free-download-windows-7_GM835599320.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/coin-master_GM406889139.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/free-roblox-inspect_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://kdlscaffolding.co.uk/uploaded_files/userfiles/files/roblox-sand-simulator-hack-android-2021_GM431946152.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_off00003ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AD9 22644 bytes
SHA-256: ccee4961ce0168dc3b435584722c1d18c5040bd9059d025bb926121054610436
font_01_sfnt_off00006d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9B 18484 bytes
SHA-256: 8cba056027220f5c23c1ca3699a63c26fe64a99975d9f84dc7ec4e72a8f0a8a9

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