Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3bd61b0d4192b8f…

MALICIOUS

PDF

43.6 KB Created: 2021-06-04 04:03:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 07f4d26995c5354081d2577161c621f9 SHA-1: 04f6f7a804cf44fe1a8c2a14ec30a756f3c58668 SHA-256: c3bd61b0d4192b8fb23d3ef639574987fc5b27425029dc6c80e2209e2b952aef
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.online/app/406889139/coin-master-hacks-to-get-spins-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-net-free_GM479516143.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_off000050a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A9 24524 bytes
SHA-256: 99e0440929b6ffe0db3ef79614163453256c90bc5bf5b843f1af390205d3d1f9
font_01_sfnt_off000088c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C7 17892 bytes
SHA-256: 7db059902895aee78608d77465270760924d1d8139de259a19e29abe504df375

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