Malicious PDF — malware analysis report

Static analysis result for SHA-256 818c83c2d5975d98…

MALICIOUS

PDF

41.9 KB Created: 2021-05-11 03:40:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 876c2373414859dcccfd50cce48e20a2 SHA-1: 4e6f68f07a8c8dd73bc4aff3820bfe19772cce13 SHA-256: 818c83c2d5975d9895d6b129d30b4ea850761a0c37e7844bc4671d14b4bdf93a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and cheats, such as 'coin-master-card-hack-apk-game-hack'. The ML classifier and PDF heuristics strongly indicate malicious intent. The document body and embedded URLs suggest a lure to download potentially malicious software or visit phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-card-hack-apk-game-hack PDF link annotation
    • http://vokna.by/images/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://vokna.by/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://vokna.by/images/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://vokna.by/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://vokna.by/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://vokna.by/images/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://vokna.by/images/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • http://vokna.by/images/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://vokna.by/images/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://vokna.by/images/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://vokna.by/images/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://vokna.by/images/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://vokna.by/images/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://vokna.by/images/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://vokna.by/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://vokna.by/images/free-robux-live_GM431946152.pdfIn PDF document text
    • http://vokna.by/images/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://vokna.by/images/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://vokna.by/images/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://vokna.by/images/coin-master-hack-download-2021_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_003_off000048f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F1 25144 bytes
SHA-256: a102db63d6e48d4e57ec1a7cee9ee839082f36a9e708478792072ed034605a87
font_01_sfnt_off00008210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8210 18068 bytes
SHA-256: 253c022fea36e2edfdded8e932a5d2c5ace7c2c75107348eb73538d72e63084f

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