Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc79f4ef147d9e5…

MALICIOUS

PDF

43.0 KB Created: 2021-05-10 23:04:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7be56be52d7f61a2f0531e275145c037 SHA-1: ab8b6aa5063da5f1a519a8d90dc7ab4a110e11fd SHA-256: 5bc79f4ef147d9e52e55453ff4b7e2aed34b32bf06f8f60e6d826c2c6ec6224a
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 0.9971

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/best-site-for-free-coin-master-game-hack PDF link annotation
    • http://www.duchidicastelluccio.it/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/mcpe-client_GM479516143.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/coin-master-in-app-purchase-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_003_off00004912.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4912 25444 bytes
SHA-256: f3b600dede03548c6d3c24c33e4b20cd726e74fb64ed7e51b2b2c85f1a6a7e29
font_01_sfnt_off000082bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BB 19252 bytes
SHA-256: 20e7c2c968cd5a1bc80ba7b48d3f152f6745e373c84802bab95606a9d5f3984f

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