Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a1661955a380d7…

MALICIOUS

PDF

45.1 KB Created: 2021-06-11 03:28:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 85236acabfa21dd6ec2cbaaea838d08b SHA-1: f633281b0fa972defaeb7c0042134a494539d94e SHA-256: 06a1661955a380d71e2e8cbfe60b41e4785a0897affa13d838511cc81c90a707
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/how-to-become-admin-on-roblox-for-free-game-hack PDF link annotation
    • http://kumotor.com.tw/upload/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/earn-roblox_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/pubg-50-uc-free_GM1330123889.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/robux-xyz_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-heaven-free-spins-link-2021_GM406889139.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
stream_004_off0000515c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x515C 25656 bytes
SHA-256: 9ca2f0284b5adcdc6fa4781330c9a4d8a0abe9c2bbadea0be0b34d706bb73f37
font_01_sfnt_off00008c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8A 18664 bytes
SHA-256: bde21cf7a6ab6765922939b1193ce2c88d1c192a3af32c566b8b1ac17e07391e

Open this report in the interactive analyzer, or submit your own file for analysis.