Malicious PDF — malware analysis report

Static analysis result for SHA-256 2807afa7a24a2c74…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 09:44:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c16c5e54a34a8d19987719582c56849d SHA-1: afe402e63f9c0f25ac0870524a2675c4c3ffa319 SHA-256: 2807afa7a24a2c74a942e7e0bdebbef2bf2cb77b46a824e3966c49d939b61c98
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains an embedded URI pointing to a lure for free in-game currency, suggesting a phishing or scam attempt. The ML classifier also flagged the PDF as malicious. No scripts were extracted, but the presence of a malicious URL and a call-to-action button indicates a likely attempt to trick the user into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/free-coins-and-spins-for-coin-master-game-hack In PDF document text
    • https://library.kysm.edu.my/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/collect-robux_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/get-free-robux-2021_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
stream_004_off000052ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AC 24464 bytes
SHA-256: cd4536af7cac86d74331e7404cb447af64e94aad7f331cf959326a8e85128bfe
font_01_sfnt_off00008ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB4 18060 bytes
SHA-256: f1068137021f01f6b5cc3550273fdf5362b49e27ffe305b66dd7920a08d48120

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