Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5fbb6b530b556a…

MALICIOUS

PDF

43.7 KB Created: 2021-06-14 00:29:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f32b6f2e54c4883d946e3be72baa1380 SHA-1: 35d5a9e335a2578658d5bdee27c44810e1905bca SHA-256: 8d5fbb6b530b556a75db03ce85caeba7d7090e43fd2f1f7a7a96cfb242c7ca85
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' which redirects to a malicious URL. The ML classifier also flagged this PDF as malicious. The embedded link likely leads to a site designed to exploit users or deliver further malware.

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 http://netcdn.co/app/431946152/how-to-get-free-robux-without-verifying-anything-game-hack PDF link annotation
    • http://katalog.ireyogya.org/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-earn-free-robuxs_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/cheat-engine-63-roblox-download_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/best-free-roblox-lua-executor_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-116-free_GM479516143.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
stream_003_off00004aaf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAF 25200 bytes
SHA-256: f2e48e5bfd95e872780c2fb61647cf76ad9ab121447ab154fb73af9699b189e0
font_01_sfnt_off0000850f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x850F 19368 bytes
SHA-256: 948d3135e18968e8af48b45f5d14c74fd7eb8df44ab0810f54436efa83f61da0

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