Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c6e0bd08b1504c1…

MALICIOUS

PDF

49.2 KB Created: 2021-06-11 07:46:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4f98dbeb734c9c193fb1c5b9db9722f4 SHA-1: aaf8eefdd33ddbf74214c57d94c2b026940c2c02 SHA-256: 5c6e0bd08b1504c1e87031aa087e3a39ccce32dafef052e018b8563c18e3b2fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The embedded URLs are designed to lead users to potentially harmful websites. While no scripts were explicitly extracted, the nature of the lures and the presence of redirector links strongly suggest a malicious intent to direct users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/roblox-the-rake-admin-hacks-game-hack In PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-admin-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/does-roblox-have-free-sneaks_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005212.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5212 27480 bytes
SHA-256: 864b668d28326e50f0a941da9dafce1336ebaa19a8b340c54d790aebc0aaa6d3
font_01_sfnt_off000091e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E2 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF2 18904 bytes
SHA-256: 40ced26014c2d0f044beee27698c71a2c6995d256e1f09b5dd437540a1b77b46