Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9edc67f1cb0424…

MALICIOUS

PDF

34.8 KB Created: 2021-07-09 02:56:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2fe60f2903500ec0aa543c56d203dbb8 SHA-1: 1c48f5e2941feac8e7bd1f073683226a2c75fe3a SHA-256: 5a9edc67f1cb0424e3b3e8839bc3ee1fa6f960c55fcf3ec4afcb75f12fe92333
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a game hack generator, which links to known malicious redirector infrastructure. The embedded URL http://netcdn.tw/app/406889139/coin-master-attack-block-hack-game-hack is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering tactic to redirect users to potentially harmful 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.tw/app/406889139/coin-master-attack-block-hack-game-hack In PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/how-to-hack-someone-on-roblox-without-password_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/how-to-cheat-quirk-system-in-boku-no-roblox_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/easy-points-gg_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/roblox-free-rade_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-roblox-card-codes-list_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/is-tiktok-free-on-iphone_GM835599320.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/roblox-studio-free-robux_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_off000032b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B7 22720 bytes
SHA-256: f7a4fd5fed10fe58687ab2a3626cf39f998fd391343329128fd8b2f6cc8235bb
font_01_sfnt_off00006553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6553 18292 bytes
SHA-256: d2ba2b0e7a3f103841e549252e20483683215ddad8ac1b66f82bb541e66cd415

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