Malicious PDF — malware analysis report

Static analysis result for SHA-256 445c827d3d3565db…

MALICIOUS

PDF

37.0 KB Created: 2021-05-22 13:44:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-11
MD5: 6e9697847f7d79b6087c1214c56a1eb5 SHA-1: 988ed1d9ecfe7a93eaba54aeb4311afce0864c21 SHA-256: 445c827d3d3565db96f39bd1abb39c20f3730a9e7b148afd159b289725d76d4f
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.xyz/app/835599320/tiktok-follower-bot-free-game-hack In PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/get-follower-tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/minecraft-java-edition-for-free_GM479516143.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_002_off000032f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32F5 28040 bytes
SHA-256: 8c2cfd419d4a786f450666861cd6e285c23399a01c863293f2d3f6a856c1ddc4
font_01_sfnt_off0000708d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708D 17912 bytes
SHA-256: 36efea1239131c533f338518497dff1810050ff8e972c00fb3f35d249e370860

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