Malicious PDF — malware analysis report

Static analysis result for SHA-256 57149dbf0b49a600…

MALICIOUS

PDF

47.9 KB Created: 2021-05-12 04:51:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 76f19533f4dbcd16d79ff80286d6c197 SHA-1: dafb80178234700bdf3c241635ecf13db08df562 SHA-256: 57149dbf0b49a600c54fbe9b5d0149a4e0560b09b7eaf921b7e12e70b6fdbb1c
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 0.8715

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 https://netcdn.xyz/app/431946152/robuxy-com-generator-game-hack PDF link annotation
    • http://pustaka.smpmuh2yk.sch.id//repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/easy-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/mathep_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000483e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x483E 24324 bytes
SHA-256: 3089c4491676a115e7ff879f94fdc207c272313f0995a9e99149eac8aa71477e
font_01_sfnt_off00007efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFE 2820 bytes
SHA-256: d88f25cfe237a714f996150a11dd8a058f0f7c3e9d1ae91c17b46c10409b6c0b
font_02_sfnt_off00008894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8894 6100 bytes
SHA-256: f866077ce59d6ea276f75e4af76daa2aab5f3a1a679df144776123d85664d65c
font_03_sfnt_off0000971f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x971F 18624 bytes
SHA-256: 564b676c83dfcfb2d17032d30a69b1d7bc1cf309ea05e1634c9d6195baca18fb

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