Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d5761313d44e43…

MALICIOUS

PDF

35.2 KB Created: 2021-07-07 02:41:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: da88362741358a7312f1aa1b1970bac8 SHA-1: d2ae8647fd3729ea9a1a7b4ea35aa0028923d73e SHA-256: b6d5761313d44e43bdf4087c4ef72f2c587c9d35fe763267fb153ec3ce49a087
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and generators to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The ML classifier strongly indicates malicious intent, and the document body reinforces the lure with specific game-related terms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/how-to-hack-roblox-accounts-2021-easy-game-hack In PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/free-robux-roblox-com-mobile4free24_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/free-builders-club-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/adopt-me-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/roblox-hack-scropts_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/how-to-get-free-robux-change_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/free-robux-sites-2021_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_off000030a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A6 22312 bytes
SHA-256: c61b915d7f3616c91ce3057ca587d34eb9155d911b31e6a21aefb27a28cc5b28
font_01_sfnt_off00006258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6258 19644 bytes
SHA-256: 282628fc42a96e3279200ec8779d80ae4dcbec71e777bf135841d81b8694e155

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