Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19a7ecf269c12d9…

MALICIOUS

PDF

43.9 KB Created: 2021-05-10 20:02:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3ddcf10883acd4fe97564ced6693494e SHA-1: 2a5cd705c20fe25e8eee776a16b87f54845ac39b SHA-256: c19a7ecf269c12d9bfdad9d0b68e44dfabe3524a37f74d221fcb9c3feaa91fc2
82 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'free Robux' for Roblox, directing users to a suspicious URL. This indicates a social engineering tactic to trick users into visiting a potentially malicious site, likely for a scam or to download further malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/how-to-make-robux-on-roblox-game-hack PDF link annotation
    • https://pt-mataram.go.id/perpustakaan/repository/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/wurst-minecraft_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/master-coin-hack_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-coins-and-spins-daily_GM406889139.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_off00004b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B76 25988 bytes
SHA-256: 1fc4294e5332a14d3084ba2e208cc291906d7eedd54be42e698e54d74172ac6d
font_01_sfnt_off00008819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8819 18680 bytes
SHA-256: 4ee66bb7c80a3238b98a264a09ad062de9bd506d82a8120fadf8a4fb1bc8e733

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