Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4969a8d8620004…

MALICIOUS

PDF

37.1 KB Created: 2021-07-04 03:50:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 58106783a9e8bd96b93ca3b1462e1447 SHA-1: d54f8b676c4d839290fbf445210e6178ea5b9d85 SHA-256: 5b4969a8d862000444ecb1d77d3f69b838f98f624016e6f9f12df82c62dd672d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links and text that lure users into clicking on a URL promising free game currency or hacks. This URL, http://netcdn.tw/app/431946152/free-robux-no-human-verification-or-survey-2021-game-hack, redirects to known malicious infrastructure. The document's content and embedded links strongly suggest a phishing or scam attempt designed to lead users to potentially harmful sites.

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/free-robux-no-human-verification-or-survey-2021-game-hack In PDF document text
    • https://goodtools.tw/upload/files/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-script-executor-free-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/guuudd-info-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-in-nba-phenom-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-roblox-games-with-no-downloads_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-lovenet_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-yellow-roblox-girl-hair_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/tiktok-free-palestine_GM835599320.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-hack-download-ios_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-2021-november-hacked_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/dj-khaled-for-free-roblox_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_off00003633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3633 22824 bytes
SHA-256: 2d8b0b374c19a8c54dafadabeab917b8e5ca7a8af5ab8b300baa044bafb4d910
font_01_sfnt_off00006910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6910 20028 bytes
SHA-256: a686843967d16d630a3d792aecd0df7810ef9440d33d67b3fe7886ce86e787de

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