Malicious PDF — malware analysis report

Static analysis result for SHA-256 572f87c1a7fa977b…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 19:07:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 107b634f7d2505e39c7f45758b8522bb SHA-1: 7ff0f561c33497512354dc4efd3060aee77e31cb SHA-256: 572f87c1a7fa977be3703ea2f98c78bf6c47637f72cff358e09c2d041c43ae52
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed to lure users into clicking links that promise free game items or accounts, such as Robux for Roblox. The document contains multiple embedded URLs, including a primary redirector at http://netcdn.tw/app/431946152/free-roblox-accounts-2021-with-robux-game-hack, which is associated with malicious redirector infrastructure. The presence of these links and the lure content strongly suggest a phishing or scamming attempt, likely intended to lead users to further malicious sites or downloads.

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-roblox-accounts-2021-with-robux-game-hack In PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-speed-hack-script_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/pokemon-card-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-speed-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-robux-youtube-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/synapse-x-roblox-download-free_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/tiktok-free-dance_GM835599320.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/add-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-hack-any-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-unlimited-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_off00002ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED4 22412 bytes
SHA-256: fcbc236ccafc74edfabb1131b99835cefd9327d83d936c0cf1079c693ddab6ff
font_01_sfnt_off00006090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6090 19780 bytes
SHA-256: a55470c357d6117f87c66cfcc5dd60461d5ad292bd735cfee1ec5bb843310ba7

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