Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5df6cb31ed0d39…

MALICIOUS

PDF

33.6 KB Created: 2021-06-29 08:46:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 35e7a382df7f0fa78f3e5bd3b5f5087d SHA-1: d070ecaceb80e362962852d92418541bb88f3e76 SHA-256: 6d5df6cb31ed0d394b830e24e35f7b8338961b00ffbca0a35f9744d54e4cc232
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' content. The ML classifier also flagged this PDF with high confidence. The embedded URLs likely lead to further malicious content or phishing pages, aiming to trick users into downloading malware or divulging sensitive information.

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-hacks-pc-2021-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/freerobuxrobloxhacknosurveynohumanverification2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-accessories-in-roblox-codes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-2021-nove-ber_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-welcome-to-bloxburg-money-cheat-july-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-online_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-everyday_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/100-free-spins-on-coin-master_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_off00002dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFB 21696 bytes
SHA-256: 63280cdbd21b74c96de2ac1c5816535d982f746a376aa2247eaafbd8ee2849ff
font_01_sfnt_off00005da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA9 19212 bytes
SHA-256: 93c0bd36b86c81995810295b6850c59803a02793094b16cf73840385f0e4d987

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