Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb85fc32d9b332f8…

MALICIOUS

PDF

36.3 KB Created: 2021-07-03 14:24:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aee6f6cc6911016bc1c6db715df7a72b SHA-1: f0a739fc8e10a13d1f4b33a63ea9ab598a5f598d SHA-256: bb85fc32d9b332f8a65ae6d875f7a58a9128b56e8db5721496ac8ff3bd11bc2b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an embedded URL that directs users to a site offering a 'minecraft-free-demo-game-hack', suggesting a lure for downloading potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a download-related heuristic further supports this. While no scripts were directly extracted, the document's structure and embedded URLs indicate an attempt to trick users into downloading a second-stage payload.

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/479516143/minecraft-free-demo-game-hack In PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/admin-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-robux-net_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/roblox-hack-extreme-nijecotr_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/i-robux_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/robux-only_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/obby-free-robux_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-generate-free-coin-master-spin_GM406889139.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_off0000379c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x379C 23292 bytes
SHA-256: ad97b2ac065f6f76388476365a847b8bd5e03d93f73dd24f185d9a53013aecc3
font_01_sfnt_off00006b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B52 18424 bytes
SHA-256: 2dd54ccfa4dc1988bbb65a3118124842aed496816f4df744ead28a073c64aac9

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