Malicious PDF — malware analysis report

Static analysis result for SHA-256 c90442db79d8d7b3…

MALICIOUS

PDF

34.3 KB Created: 2021-06-25 05:29:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fdae4f95211647516daecc836645e086 SHA-1: 5b91b47efd2d7a56b06698b416d6daaed1ba177a SHA-256: c90442db79d8d7b37f99528a51b010ce6eebdd9b07763edccbcb9c0bb8dfdf47
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and currency to entice users. It contains numerous embedded URLs, including a primary redirector at http://netcdn.co/app/431946152/roblox-tix-factory-free-game-hack, which likely leads to a malicious payload or phishing site. The ML classifier strongly indicated maliciousness, and the heuristics confirm the use of game hack lures.

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-tix-factory-free-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id/repository/free-items-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/make-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-take-someones-group-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-robux-for-free-2021-without-builders-club_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-mobile-ios_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-game-no-download-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/vehicle-simulator-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-server-test-cheat_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/the-quarry-roblox-hacks_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_off00002dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD0 22768 bytes
SHA-256: eaa48dcfef2b5c357781ebe3d51b5b6a6e265b3df8b0af7a798f47ebc726926d
font_01_sfnt_off000060fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FC 19052 bytes
SHA-256: a8a5c4175bfd3688f6fee75f6c5837f7fd0de3d694d35e9a347febc3c3795e0a

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