Malicious PDF — malware analysis report

Static analysis result for SHA-256 66718caf182698b0…

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 00:41:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ad2e3583a91a4598a34ab381a10c90bc SHA-1: 096749f8ee620003382cc0fd498568d934332206 SHA-256: 66718caf182698b0ce0dd0fa72e732f258adb7bd45caa70d319f85e1e0c5ed05
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a high-confidence heuristic indicating it links to a game hack redirector, specifically targeting users interested in free spins for Coin Master. The document body and embedded links reinforce this lure, directing users to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely to download a second-stage payload or phish for credentials.

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/get-free-spins-coin-master-game-hack PDF link annotation
    • http://bemviverclin.com.br/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://bemviverclin.com.br/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-to-get-free-robux-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_off00004a16.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A16 26252 bytes
SHA-256: f962f20d3590f6083b5455b765c8aa3a8aa7554d664b486c8b4432da7ab89c98
font_01_sfnt_off000085bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85BD 17884 bytes
SHA-256: b0210710b9f532dde69bab3e54691bd54d84b0d7d990975f20826afd1ba27450

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