Malicious PDF — malware analysis report

Static analysis result for SHA-256 f28b02e824b35b42…

MALICIOUS

PDF

34.3 KB Created: 2021-06-26 05:19:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 82287b2360489ca2778ef00ede8f5d7b SHA-1: 28303edcc642d0773d10262e61590764d0da7206 SHA-256: f28b02e824b35b42f35df8a33d4c927644ffbd54e19a2c68de633bf9eff23ccd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action lure related to game hacks and free generators, directing users to a known malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting the malicious URL, likely to download further malware or engage in phishing. 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.co/app/431946152/free-admin-roblox-how-to-turn-itto-others-game-hack In PDF document text
    • https://kldcardio.ru/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://kldcardio.ru/images/roblox-flying-hack-free_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/has-roblox-been-hacked-2021_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/roblox-skina-free-copy-paste_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/cute-roblox-outfits-for-girls-and-for-free_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/bleach-primera-hack-roblox_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/play-games-for-robux_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/how-to-hack-in-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/fashion-frenzy-roblox-game-free-download_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/audioscribe-free-fall-ncs-full-roblox_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-roblox-clothes-pastebin_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/roblox-free-clear-clothes_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/roblox-does-cheat-engine-still-work-on-roblox_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://kldcardio.ru/images/coin-master-free-spins-2021_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_off00002e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E27 22052 bytes
SHA-256: b0a020ac53b7142899ef49feaf1a0102b2635e4195484ceb4a1b8e1f22b39829
font_01_sfnt_off00005ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE0 19776 bytes
SHA-256: 935faaa1666c046dd9e988f033aa299eb6fbf1d6bc87d73bdf232fae84fbfeb7

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