Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e3f7f521c4adf5…

MALICIOUS

PDF

49.3 KB Created: 2021-06-03 14:39:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 75664cc04fc55c575283853c7ed0b499 SHA-1: 110e81278bcf639c541e1595b4ddddc0080b088a SHA-256: 98e3f7f521c4adf5fe0af552a057773e35a5ebc054727de95171e3329fea54b9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a URL that leads to a download for 'free Robux', a common lure for malicious files. The ML classifier also flagged this PDF as malicious. The presence of a download button heuristic further supports the malicious intent of tricking the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/free-robux-no-verification-2021-android-game-hack In PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/wurst-client_GM479516143.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_off000053f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53F2 25296 bytes
SHA-256: f1b6e0c51bdd680b9bdb13477c9182e7a6969bd745cb0e0c7583cd389945f93d
font_01_sfnt_off00008e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E50 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B61 19176 bytes
SHA-256: 2db8195158682863467aa5049c27493158ce29af4e73d213a7d216c5b0c72741

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