Malicious PDF — malware analysis report

Static analysis result for SHA-256 559ebf6f8f7a32c1…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 17:46:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4df9968d1c00d9957a046ba1bee789fb SHA-1: 2b9c93553e1a5a6c94b298e922ab2e1803837dae SHA-256: 559ebf6f8f7a32c168d8605ad6aec3ab906a5185ef1e55f265aa6597a0fac454
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'Free Robux Generator 2021' and links to external URLs, indicating a social engineering attempt to redirect users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs and the 'game hack' lure suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-robux-generator-2021-game-hack PDF link annotation
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/roblox-shinobi-life-face-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/ww-roblox-come_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/roblox-robux-hack-no-offers_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/free-robux-us_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/wurst-client-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/free-robux-giveaway-everyone-will-get-robux-proof_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/free-robux-codes-that-are-not-used_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/how-do-you-get-free-hair-on-roblox_GM431946152.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_off00002ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EDE 22652 bytes
SHA-256: 3ae95d248e7765f6e4649af6c0c7e81c7c6409319675524407e6e7dc62cf4510
font_01_sfnt_off000061b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B4 19224 bytes
SHA-256: e428ca4c21c8feda58ff9d2cee9e63eb7b19a929803cf1f6eebeef0755d1c14a

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