Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ca18b1b39eabe2…

MALICIOUS

PDF

43.0 KB Created: 2021-05-12 05:06:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9b9b0cbe0be7c7635f9038827b11258d SHA-1: 61e8b52a90f39f62572f012f0435e96a4e30a009 SHA-256: 22ca18b1b39eabe2cfeea8de46464bfff3c8bed9fb38179838f4db2b8770d8f2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "generators". The primary lure URL is https://netcdn.xyz/app/431946152/roblox-online-free-no-download-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt, likely leveraging social engineering to trick users into visiting the malicious site. The ML classifier also flagged this document with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/roblox-online-free-no-download-game-hack In PDF document text
    • http://fia.ub.ac.id/katalog/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-spins-hacktman_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
stream_003_off00004b05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B05 24904 bytes
SHA-256: fc2383e987824cb339c5069a73576744fad306e4715cd95384f575a239d06c0c
font_01_sfnt_off00008440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8440 18804 bytes
SHA-256: 6fb5cf719d1be48a9d1666bba8fc7670265b54a481b05bd95291926c1d5df909

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