Malicious PDF — malware analysis report

Static analysis result for SHA-256 4808586555dfcdcc…

MALICIOUS

PDF

33.2 KB Created: 2021-07-20 11:03:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9ae61557046848b271b280fc8c4233ce SHA-1: aa1fa05fdd4b1163290f0f8ee2e3029cad7005d6 SHA-256: 4808586555dfcdccb9b2a5ca3db4d6b921c3d4ff757580a55d5ece6816029672
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to malicious infrastructure. The embedded URL http://netcdn.tw/app/431946152/how-to-get-free-robux-on-ipad-game-hack is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristics suggest an attempt to trick the user into navigating to a potentially harmful site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/how-to-get-free-robux-on-ipad-game-hack In PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/get-free-likes-on-tiktok_GM835599320.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_off00002c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4C 22160 bytes
SHA-256: aaf964ba0f426a0b1861c0e54e366d05fbbba6b4c2bbdaf229cf3e5d0055d721
font_01_sfnt_off00005d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D75 19044 bytes
SHA-256: fc40f46b89ee5eb81c4a3ee8e07ce7b89220573e4da3f1efd7ddd3b0f2f06e4f

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