Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e439ce945a70688…

MALICIOUS

PDF

37.1 KB Created: 2021-07-20 13:42:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8b135af2b569066c1208e684dcb07180 SHA-1: bee353c292039575866879aa0e1453bbd5dafc39 SHA-256: 4e439ce945a70688fa8784c3c7d5ea8aaf731b935bce11ca05b00ffce9c62caa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to 'netcdn.tw', which is flagged as a malicious redirector. The document body explicitly mentions 'Minecraft Free Download Windows 10' and 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', indicating a lure for potentially unwanted software or malware. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9216

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/479516143/minecraft-free-download-windows-10-game-hack In PDF document text
    • http://library.atim.ac.id/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB4 23308 bytes
SHA-256: fcdb1996215c3cdce42ccf2c11ff8313ce870c3bc63aed3a052e948759f2f454
font_01_sfnt_off0000633d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633D 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00006d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D39 18764 bytes
SHA-256: 1024eac42dda9887ab3e6b3a3052baf0f02eb021d29d3096c75228bb34fedc86

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