Malicious PDF — malware analysis report

Static analysis result for SHA-256 082305d30c4fcbe9…

MALICIOUS

PDF

45.1 KB Created: 2021-06-07 21:17:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d361f23817e7584ba85091337c784028 SHA-1: 69ea2680f371dafc8a6ff127cc11ccaf9fb4cd1c SHA-256: 082305d30c4fcbe9dfb01f13690894dade806e35c6949b65f46fe4363c31f2aa
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 0.9865

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.tw/app/431946152/how-to-hack-roblox-tycoons-2021-game-hack PDF link annotation
    • http://cosver.eu/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/roblox-re_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/tiktok-free-pictures_GM835599320.pdfIn PDF document text
    • http://cosver.eu/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/static-moonactive_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-70-spin-link-today_GM406889139.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_004_off00004ec1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EC1 25992 bytes
SHA-256: a59c0c70e47fb842dae76793b02ab25fdf3e27c3e2c2694fe1df5ece5e4abeef
font_01_sfnt_off00008b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B43 18928 bytes
SHA-256: 7a9739d827369049c859501be91b6d85eefa2f8ce30aceab26b816b8bffa66af

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