Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0897c7fea755ba4…

MALICIOUS

PDF

34.3 KB Created: 2021-06-23 00:31:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 971fc383354f53417f98e2e0eb57f35b SHA-1: 85cc854d1e0cbfdffa49f972a773d98d7ebffc1a SHA-256: b0897c7fea755ba458e927aed9220c78e412933debc3936149ca7203ac0a124e
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 0.9980

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.co/app/431946152/como-hacker-roblox-game-hack PDF link annotation
    • https://admin.9credit.vn/data/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-is-giving-away-free-i-robux-at-rbxgift-cf_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-roblox-shirt-bot_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/spin-and-coin_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-account-accounts-roblox_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/coin-master-strategy_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/rxgate-cf-redeem-free-robux_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-get-2021-robux-for-free_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_off00002f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2F 22676 bytes
SHA-256: b10bf8256a33994bf909665c6b3e17b1d30c104cc453ff6e76092a9af1b7b678
font_01_sfnt_off0000613f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613F 18916 bytes
SHA-256: f47b009e93c0412e4aa2db9900e48a98c0c093575f5ba54008dbc937ab94ba33

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