Malicious PDF — malware analysis report

Static analysis result for SHA-256 acba4ac7b0bc9691…

MALICIOUS

PDF

34.6 KB Created: 2021-06-18 16:20:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f4c64af0095f184f9e94af865e809e51 SHA-1: 1e97f9573c74624f8f7c8d6a93f16fb05e04d6f2 SHA-256: acba4ac7b0bc96919db0bc0c5ef2096cd6c6c34a4827cf6ba6de59f810fd968c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux generator' and 'game hack' which redirects to the URL http://netcdn.co/app/431946152/free-robux-generator-roblox-game-game-hack. This indicates a phishing or scam attempt, likely to deliver a malicious payload or lead to a credential harvesting site. The ML classifier also strongly indicated maliciousness.

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-robux-generator-roblox-game-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/funneh-roblox-simulator-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/pokemon-go-free-808_GM1094591345.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-hack-client-2021-download_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/can-using-free-models-on-roblox-get-you-baanned_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/google-moon-active_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-be-unbanned-from-game-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-games-to-download-for-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-2021-unlimited-codes-for-kids_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-minecraft-mods-for-ps4_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
font_00_sfnt_off00002ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED0 23104 bytes
SHA-256: 3e18c1fbe76537fef63edb3ac657127e69dc95efa7ef15827d3d6bc307433c52
font_01_sfnt_off000061bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 19152 bytes
SHA-256: bab097a439d0b797cb1ee9fbe3d9bde3e3d95fde2800a8e9d488af6535133fab

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