Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d3782c3a1c7192…

MALICIOUS

PDF

42.1 KB Created: 2021-05-16 22:08:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 86f8397c37c37460ef2e6b0b510764d5 SHA-1: 52f7f5a5716c7f490b670acf619ff60c2eb87b44 SHA-256: 94d3782c3a1c7192bd35487472aa1d541cfcf4ccf0bbb90c88ec9c92078f4c98
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a lure related to game hacks, specifically "Coin Master Hack" and "free spins", directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in game cheats to redirect them to potentially harmful content or initiate a download.

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/how-to-get-more-spins-on-coin-master-hack-game-hack PDF link annotation
    • http://cosver.eu/images/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-hack-without-verification-code_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_off00004827.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4827 25436 bytes
SHA-256: ddeef381e329e23fafa268bfed564575e3392c559f251e139d7e847300254427
font_01_sfnt_off000082df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DF 18056 bytes
SHA-256: c25be2ee10aa6c8dac98d181bff9bbb73a764afdf7857c2243de642e2757df86

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