Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e1e87e40d281bc…

MALICIOUS

PDF

41.2 KB Created: 2021-05-12 00:55:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fe21167b1b464eef7e8d0b405561609a SHA-1: 140fd393cbed8486654c5f6eee20bd36d851aeef SHA-256: d5e1e87e40d281bcf7c85d8f034db6f3ea5b90f6a49a193f33c076cbcdaf067a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free spins, directing users to a suspicious URL. The presence of embedded links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a social engineering tactic to trick users into visiting a malicious site.

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/free-spin-link-in-coin-master-game-game-hack PDF link annotation
    • http://www.notaioricci.it/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/robux-claimer_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/robux-codes_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/20210-robux_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/how-to-get-free-robux-promo-codes_GM431946152.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_off000046bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46BD 24312 bytes
SHA-256: e0d4456f3da452a60cdf588b62445d4465d7fec696cc47bc965caade4ca2444b
font_01_sfnt_off00007e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E78 18316 bytes
SHA-256: 83e319b57b25df8003591b2f8cd8f74939fd682d39c72f42c8d3fdd92a1d2569

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