Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e73e855f9a1955f…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 10:09:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0893c1b8bcb282347d89dee7374cedcd SHA-1: 300e5d1d8053cf65584697a80ef27812f013f8ca SHA-256: 0e73e855f9a1955fd1ff2134340aea1bd0a038773312ab879b3d27d17c9c3aba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them by promising free game-related items. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for further malicious actions upon user interaction, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/431946152/get-free-robux-without-human-verification-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/tiktok-free-save_GM835599320.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/robux-app_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-do-you-hack-minecraft_GM479516143.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_off000053c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C2 26652 bytes
SHA-256: e7d967b0d43695fa2f9f84236d80e6e28ca7c40ba1056a872dfc20628af9e0b0
font_01_sfnt_off00009143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9143 19224 bytes
SHA-256: d26e558c8d9f3aa3a60cf99b5f2b698b808b007009279a89da7a3b2992804aa3

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