Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3a26a909bef151…

MALICIOUS

PDF

32.7 KB Created: 2021-07-09 17:20:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7df0d62fe3fb144bbec15b9b9628090b SHA-1: 993d89f87d6db534f4511c0ed3c82134f05fd135 SHA-256: 4d3a26a909bef151c7e4c3e7d4c5f6086dfe15d3b5df98976c2aaec1c81adc96
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 0.9824

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/more-robux-game-hack PDF link annotation
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/5-games-that-give-u-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/elts-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-items-with-this-admin-code_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-roblox-figures_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/roblox-account-hack-script_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_off00002bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB1 21888 bytes
SHA-256: 1fa0de39623e7307312fbc1ac39a368ad44b35f8cfe8380d2d39d27ebcaa7098
font_01_sfnt_off00005bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDE 18748 bytes
SHA-256: ecdcc197c8d83bf2d5642375f01ab1b4a86cd735eb7856bd1198af4e763782cf

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