Malicious PDF — malware analysis report

Static analysis result for SHA-256 1afa23b94ab44f3b…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 07:03:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9c6e0ce2931982a9195bcc434089d805 SHA-1: 968005dc9e5b2b3bf51c75984150c365ffe32079 SHA-256: 1afa23b94ab44f3beaab13fc10ab421e770e125b46936bd825aa04401561a27f
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 0.9864

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-hack-version-download-2021-ios-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-and-coins-hack_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_off00005183.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5183 25600 bytes
SHA-256: 0253f5eeb2b1817cab56a886474e6d15edc1d1deb1466247fa20bea72ee51fd6
font_01_sfnt_off00008cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB7 18832 bytes
SHA-256: cc7b03749ee8e0bb295fc18f3327ccd24d21e4560feed49354a921164f87bbf0

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