Malicious PDF — malware analysis report

Static analysis result for SHA-256 500d857e46daf0c9…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 14:17:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7dc3775a3f5739fa7c0d5e11124eb1bf SHA-1: 5aa30d332d054c4ec75aeda23a111323ef0a37ee SHA-256: 500d857e46daf0c97e482cdd9fe5e42d46ae7c5d87e2abf3544eb436c7c972ad
200 Risk Score

Malware Insights

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

The PDF document employs social engineering tactics, presenting a lure for free game currency or hacks to entice users to click embedded links. These links, such as 'https://netcdn.online/app/431946152/free-robux-no-human-verification-or-survey-or-download-2021-game-hack', likely lead to malicious content or downloads. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to exploit user interest for potentially harmful actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/free-robux-no-human-verification-or-survey-or-download-2021-game-hack In PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/easy-robux-today_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-without-verifying-2021_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_off000050f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50F7 25264 bytes
SHA-256: 88ce1cba0e45abd7b06ca02d1f84d10fde5008806ea9b598394ffff1968ac213
font_01_sfnt_off00008bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF5 20136 bytes
SHA-256: 66e5e50e12f5eb49621ab9bcd6ab85026409d616512a452c1eb3339dd9867554

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