Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8965fdfd01b9c2…

MALICIOUS

PDF

35.6 KB Created: 2021-06-27 20:00:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: edffef193402c057c33cecbcc04d125e SHA-1: 69d62ccc37a903d54a28f7b301999b3383e26e2c SHA-256: 4f8965fdfd01b9c2a2fae9c80b2d0e4adf8703ebab0bb4a242d6eeb8ff08945f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with promises of game hacks and free items for popular games like Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a malicious intent to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the presence of numerous links suggests the document's purpose is to facilitate the download of a second-stage payload or lead users to a phishing page.

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/free-t-shirt-design-maker-roblox-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/roblox-redeem-card-pin-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/cheat-to-have-highest-rank-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/cheat-roblox-no-clip_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-any-item-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/cheats-for-prison-life-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/como-hackear-la-cuenta-de-alguien-en-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-real-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-shirt-template-download_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/store-empire-beta-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robux-code-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-the-best-shirts-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-are-roblox-cheaters-cheating_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off0000350c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x350C 21816 bytes
SHA-256: f807b32ac71830aada9a4979610083cef31cc644c258253c95f07a67f8b54c93
font_01_sfnt_off000064d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D6 19576 bytes
SHA-256: cbb34c4e730122115c0e45b7ca15e42a093fefe03a1d3b05667ea5fbe4296064

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