Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f7e4ca8d7d887a…

MALICIOUS

PDF

35.1 KB Created: 2021-06-18 17:59:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c85e42acaf6e964ad760b706f447f6ad SHA-1: 1dc5af63c0b6e2219f7d584d65fbfb351580c3cb SHA-256: b6f7e4ca8d7d887a9bae6f8d551e519b025496ab8bd58c5f51da7a440827de9c
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/free-roblox-codes-september-2021-game-hack PDF link annotation
    • http://tehergumi.hu/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/how-to-hack-roblox-to-get-free-builders-club_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://tehergumi.hu/images/roblox-hack-game-guardian_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/roblox-2021-free-items_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://tehergumi.hu/images/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/pubg-uc-20210_GM1330123889.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_off000030fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FD 22188 bytes
SHA-256: 37556f79b474213ff0ff5d974f3f98728747040e4b42f3222814f60005abbf96
font_01_sfnt_off00006243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6243 19580 bytes
SHA-256: 24308a33410f985a7fd92d555d858fae1bfdfcecc09ab41d40f8bffef45ee23f

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