Malicious PDF — malware analysis report

Static analysis result for SHA-256 28dfb3b0406fb4d4…

MALICIOUS

PDF

35.9 KB Created: 2021-07-09 05:50:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0a47abbef15ccebb3bf8f835533a095e SHA-1: 62454b86c637be963214f5e61479bc9aeea03ee4 SHA-256: 28dfb3b0406fb4d4461cf072014a0bbd1caee890131e30d5c5f47c0bac9c2719
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 generator' or 'game hack'. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. The document body and embedded URLs reinforce this lure by mentioning game-related terms like 'Robux' and 'Minecraft'. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/free-robux-com-no-verification-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-adidas-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/spin-coin_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-money-cheat-codes-xbox-one_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-roblox-accounts-in-game-with-rc7_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-may-2021-no-suscribe_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-free-exploit-lvl-6-september-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/groupe-nicdaraiche-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-how-to-change-your-username-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-windows-10-edition-free-download_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
font_00_sfnt_off000032db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DB 23056 bytes
SHA-256: cbd181da5d9a7ba24cc7c622d17768fefa4c6581f8ca7e6570012ed72eec4a0f
font_01_sfnt_off0000668d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668D 19336 bytes
SHA-256: c813de002ff3dbe8c0a3897963b9aec5f795785f2e6b2d861bbfa4c347d96c2a

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