Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f3cf4aeb1658cc…

MALICIOUS

PDF

33.7 KB Created: 2021-07-09 23:25:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c776746ecf8feb8ded9b338e3bb03f1e SHA-1: 91c8994549e4dba22ac548548bc3ce99b54f7134 SHA-256: 76f3cf4aeb1658ccf923207f19c8bbb34981545bccecdc73dca31723f689cb20
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs, with a primary focus on luring users with promises of game hacks and free currency for popular games like Coin Master and Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the nature of the lures and the embedded URLs suggest a phishing or scam attempt, likely leading to a malicious download or a credential harvesting page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-spin-free-game-hack PDF link annotation
    • http://atiltd.com.tw/upload/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/can-i-change-my-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/hack-de-juegos-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-do-i-hack-someones-roblox-acc_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-roblox-shoes_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-roblox-sut_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-hack-2021-redeem-card-codes_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-hack-in-roblox-2021-for-just-started-hackers_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/players-involved-in-the-2021-hack-roblox_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-get-any-username-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-get-free-robux-free-robux-tips_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/tap-this-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-roblox-oof-sound_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
font_00_sfnt_off00002f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F77 22444 bytes
SHA-256: 8fa4665aca6e58ea108e218afd313fcd734ae34954c83a505af1db9946636bc7
font_01_sfnt_off0000615c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615C 18176 bytes
SHA-256: 9d64f59deaede30a08c34bcec3da02112a68e9d41babb799f745357d62befbf6

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