Malicious PDF — malware analysis report

Static analysis result for SHA-256 441d2fab9aff0a3d…

MALICIOUS

PDF

32.6 KB Created: 2021-07-06 08:12:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4cbbd43a02d9650ec9bdd2f5883e4ff6 SHA-1: 7023ff001165154274e29f0cf93a74844e156e54 SHA-256: 441d2fab9aff0a3d830bbc64d4715c9f5837d1b71fab48f9166fad4debeb27d5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that lead to a known malicious redirector infrastructure, promising free game hacks and currency. The ML classifier strongly flagged this PDF as malicious. The embedded links are designed to lure users into clicking through to potentially malicious 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.tw/app/431946152/free-robux-rewards-game-hack In PDF document text
    • https://mbbs.hr/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-hack-gg-uardian_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-op-boku-no-roblox-account_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-do-you-hack-money-on-roblox_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-promo-codes-2021-april_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/hack-portal-heroes-roblox_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-obby-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-hack-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
font_00_sfnt_off00002b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B05 21440 bytes
SHA-256: 5a136314dffc0b68def1e3385d9e3d899561a9e18fc8d8a55c7c56599734bc1a
font_01_sfnt_off000059ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59EA 19056 bytes
SHA-256: 5fd868e4ea22638534696fb0cd66a74addf388445670d9d0517416fd5b37f315

Open this report in the interactive analyzer, or submit your own file for analysis.