Malicious PDF — malware analysis report

Static analysis result for SHA-256 b316b937f2cd8f36…

MALICIOUS

PDF

36.0 KB Created: 2021-06-25 23:50:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7763ca6d5eab0aff0246fafdfe684913 SHA-1: 1dec654d3c0f2477c3e41256e0ffedaae72f0be4 SHA-256: b316b937f2cd8f3621b6871e4b10235a239402baf92816a80a79de54e7ad95bb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.co/app/431946152/roblox-hack-sans-verification-humaine-game-hack PDF link annotation
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/roblox-bloxburg-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/roblox-flood-escape-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/tiktok-free-photo_GM835599320.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/roblox-games-with-cheat-codes_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3lebak.sch.id/__statics/gudangsoal/files/hack-robux_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_off00003378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3378 22868 bytes
SHA-256: d2da1a782bf5a5dd986daa2be0ba2731aae995738202ca441a2f65bb949ed66d
font_01_sfnt_off000066c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C0 19412 bytes
SHA-256: b327c9627b4a0da5ddc54ca4d95409a7f436a007957baefac3f150923851ef19

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