Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e541554d6f4fb4…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 17:22:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 60b70910c96f862f8824f6a6c3f01d2a SHA-1: e28c0344965d40a90d440bf27d796e5c90bf8f1b SHA-256: 10e541554d6f4fb49f7a4ff96520e302b2f4ff92b9ee57f158bc68c9d5134b7c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a high-severity heuristic firing for linking to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/479516143/minecraft-free-install-game-hack. The document body also contains this URL and related keywords, indicating a lure to trick users into clicking the link. The ML classifier also strongly flagged this PDF as malicious.

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/479516143/minecraft-free-install-game-hack PDF link annotation
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/roblox-free-robux-deutsch_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/free-roblox-giveaway-accounts_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/roblox-escape-games-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/cheats-for-bear-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/free-robux-no-survey-or-human-verification-or-download_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/roblox-jailbreak-how-to-get-money-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/free-roblox-jailbreak-vip-server_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/free-tiktok-views_GM835599320.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/top-12-groups-on-roblox-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/roblox-cheat-engine-fix_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/cod-cheat-legends-of-speed-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/roblox-free-robux-code-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/hack-rc7-roblox-download_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/claim-gg-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtspsmtanen.sch.id/__statics/gudangsoal/files/how-to-hack-almost-any-game-roblox-november-2021-100_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_off000032ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32FF 22436 bytes
SHA-256: c7ec3142fa78d8a9d2076f5cac72e2fa3487c6534958e493522a1629f8ca11cc
font_01_sfnt_off0000649a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649A 17928 bytes
SHA-256: ecac4b827e849319c0c5044e9321c91e8ddddd01a8be4fd48df7e18ba0227d57

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