Malicious PDF — malware analysis report

Static analysis result for SHA-256 313696ef2d14337f…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 09:05:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fb9d004b16214a10b46a5d5c05c14929 SHA-1: 153d63ee758da32e852448b55aec5f6a9a467803 SHA-256: 313696ef2d14337f7fba50f83521aafb0ac510b49f0bf4fe4f8b03dbaf26632f
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 what appears to be a free Robux generator or game hack. 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 URLs strongly suggest a malicious redirection workflow, likely intended to lead users to credential harvesting or further malware delivery sites.

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/431946152/sites-to-get-free-robux-game-hack In PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/rblx-gg-free-robux-today_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/best-games-to-hack-on-roblox-non-fe_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-online-multiplayer-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/moonactive-free-spins-link_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
font_00_sfnt_off00002ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE9 23012 bytes
SHA-256: 2036b36b87bfcab66af552a0a5cfb58fbfb4c7f8d26e80ecc2902d1ad19acf16
font_01_sfnt_off000062e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E7 18940 bytes
SHA-256: 12a760e2c1ec97f90af30afb205c0b6409d60b5d12cf2c59927e5ecc658ee3cf

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