Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc624be7d2cf37d…

MALICIOUS

PDF

41.7 KB Created: 2021-05-14 11:27:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fc56889d5870c81770cdfc627e9bd445 SHA-1: 12ba06a06dcf1a2dcfbdf8a064e0789a28e18c05 SHA-256: abc624be7d2cf37ddfba1196ddf1528647282e9cc2eeb5c1e4c8ed51745a5677
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 'free generator / game hack' redirector, specifically pointing to a URL associated with Coin Master game cheats. The document body, though partially obfuscated, also contains this URL, suggesting a lure to a potentially malicious site. While no scripts were directly extracted, the PDF structure and embedded URI strongly suggest a social engineering attack to redirect users to a malicious resource.

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/app-store-coin-master-free-spins-game-hack PDF link annotation
    • https://xiangquan.com.tw/image/data/files/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-spins-and-coins-in-coin-master_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_off0000494e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494E 24900 bytes
SHA-256: 663698878bb43fa128a1a6a3e9bfc5654dfc896c106b83233f5ae7371b00bed4
font_01_sfnt_off000081bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BB 17884 bytes
SHA-256: 15d60cc77057721479c2c3ca49413555afe2d2a7cff89bd17ba391003fc80ca3

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