Malicious PDF — malware analysis report

Static analysis result for SHA-256 0095287b08f2b90b…

MALICIOUS

PDF

33.8 KB Created: 2021-07-09 02:03:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ca20bb903ec734a91dab06abf272238f SHA-1: 906f4346082286b6debb042dbaf86581bd0b3b01 SHA-256: 0095287b08f2b90b8640a2b71e0e2835b807a2b65ef0d84e9cc54812537848a6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links designed to lure users into clicking on what appears to be a generator for in-game currency or items. The primary link, http://netcdn.tw/app/406889139/coin-master-hack-no-download-game-hack, is flagged as a known malicious redirector. The document's structure and embedded URLs suggest an attempt to exploit user interest in free game-related content to redirect them to potentially harmful sites, likely for credential harvesting or malware delivery.

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/406889139/coin-master-hack-no-download-game-hack In PDF document text
    • https://and.co.id/assets/CKImages/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/play-coin-master_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/app-master_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/infinite-robux_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/how-do-u-get-free-robux_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_off0000310e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310E 21596 bytes
SHA-256: e848dda82749a78cc17ec25ec089293903420ef7563a3dcc93914dd796b7e512
font_01_sfnt_off00006039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6039 18584 bytes
SHA-256: 63d21c21b6b581299bfa41b98ac8f0ee0c1d7d8894a5210bcadc842d74f0a609

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