Malicious PDF — malware analysis report

Static analysis result for SHA-256 693d8e517aa279bc…

MALICIOUS

PDF

33.0 KB Created: 2021-06-26 08:30:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 564ddd264940137043669f5bdf62813f SHA-1: aa6f77d38c15caaeb2b68503b4b31dc4f8fe82de SHA-256: 693d8e517aa279bc757cc830f5d12f5322f36c7eaccdd4d04ddd8ced4d43b10e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also flagged this PDF as malicious with high confidence. The presence of these lures and malicious redirectors indicates an attempt to trick users into visiting harmful sites, likely for credential harvesting or further malware delivery.

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/free-roblox-shop-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/52-000-000-robux-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-roblox-accounts-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-2021-easy-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/fly-hack-roblox-no-cheat-engine-any-games_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hack-de-matar-gente-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-surver-clam-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/robux-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-anti-hack-saving_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/gui-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-script-pastebin-no-wait_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/item-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacker-clothing-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_off00002d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D16 21416 bytes
SHA-256: 2d40e9c0c018abc137c76125bec508b8f4f28962fd62b062cf2e7223a0ab181e
font_01_sfnt_off00005bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEC 18992 bytes
SHA-256: c7ae5b4df26ee266db701eefc2e1215d2c17bd202753c15bc407cd4c7396f518

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