Malicious PDF — malware analysis report

Static analysis result for SHA-256 5550e2f8c5a80c88…

MALICIOUS

PDF

32.6 KB Created: 2021-06-27 20:56:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6a893124f1e0bcb7595d2a1a590a8ccf SHA-1: 578f31807d6b3363b574c602137ccd22b02163df SHA-256: 5550e2f8c5a80c8817cd35aa72be8f4f1f62c43239c2c4c64fa58942cac422b9
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 items or hacks. The primary link, http://netcdn.co/app/431946152/roblox-free-items-game-game-hack, redirects to known malicious infrastructure. The document body and embedded URLs reinforce this lure, suggesting a phishing or scam attempt to redirect users to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.co/app/431946152/roblox-free-items-game-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/hack-roblox-windows-10-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-hack-menu-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/cone-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-10k-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-can-i-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-robux-hack-deutsch-pc_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-accounts-2021-with-robux-may_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-tool-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
font_00_sfnt_off00002d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6F 20752 bytes
SHA-256: ec1a76ea0ddc2df3ea745cc844c1cd7bd031808e072c05dc7fbd0d7480717430
font_01_sfnt_off00005a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A33 19016 bytes
SHA-256: d1a15cf7c115b0e603c32db9afd094300b144accedbaa10a27ca2571422d933b

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