Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b99ae52f353d92…

MALICIOUS

PDF

35.3 KB Created: 2021-06-27 11:50:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 59fec4a5f06529f1ef2e0e94a7ff041c SHA-1: c37fd2ddcb15ab896c63d3b855e2b3436e097ae0 SHA-256: 56b99ae52f353d92e2af9a87bc153c300908e2f7797022d4b475e93f0bf0bb5d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for game hacks and directs users to a known malicious redirector URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt to redirect users to potentially malicious content.

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/esp-aimbot-wall-hacks-roblox-first-person-shooter-gui-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/hacking-roblox-thumbnail_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hacking-egg-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-earn-free-robux-giftcards-no-scam-or-clickbait_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/robux-hack-dot-net_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-how-to-hack-with-cookies_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-free-items-september-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-red-hair-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-roblox-on-computer_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/admin-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/jailbreak-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-mguis-roblox-advanced_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-code-generator-for-roblox_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_off00003079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3079 22432 bytes
SHA-256: 17dcbe94652403acd57ca4e95981e98213801a948bece266b814de704d60dd03
font_01_sfnt_off00006221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6221 20136 bytes
SHA-256: 24a33f3fe7d8c39ab439bd0ae2dbf68c43051f4c11e9d12a8086442a96e062fc

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