Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb6ca178b4c70d2…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 09:36:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c0244689fc1dc0cb8cefc1f979594d7c SHA-1: 808c69113439700c971704b81605897d94be1395 SHA-256: dcb6ca178b4c70d2e9075aa127d5b57a92424c8d9cf7b2801c62ef6e69f17d29
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-free-spins-facebook-game-hack PDF link annotation
    • http://library.umla.ac.id//repository/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/www-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-hack-apk-download_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_off00004f55.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F55 24128 bytes
SHA-256: 0de5da2ac744f18eac1206626318c8b2f6510dbffa17912e0bfefaf9e35feea0
font_01_sfnt_off00008647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8647 18212 bytes
SHA-256: a7d0484bdc545634c9b46f4dcbf794c30064c3aaaf3cdd537b213ac19f08a95c

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