Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0ab98d11d7784a…

MALICIOUS

PDF

35.3 KB Created: 2021-06-28 03:08:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 14ed372a335de506259693ebe02c47aa SHA-1: 69e866148148511d3ab27f15fbfc5608dc947e1d SHA-256: af0ab98d11d7784a431501f4cbd01f611d2e4c406d5538e08346ffec2f57dcd0
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game hacks and free currency. The heuristic 'PDF_SEO_LINK_FARM' and the presence of multiple URLs related to 'free robux' and 'game hacks' indicate a deceptive lure. The document's primary function appears to be redirecting users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-hack-seven-hour-war-rp-roblox-game-hack PDF link annotation
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-free-shirts-and-pants-girl_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-roblox-card-reedem-cod_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-no-scams-no-verification-just-username-and-amount_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/cheat-engine-roblox-2021-pc_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-valentine-generator-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/synapse-hack-roblox-murder-mystery_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/get-20210-robux-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/apex-adventure-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-update_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-promo-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-just-sign-in_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/hacker-music-roblox-id_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-code-de-triche-gratuit-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/comment-hack-roblox-en-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-chat-cheats-on-rocitizens-teleporting_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_off00003190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3190 22508 bytes
SHA-256: cfd030fd3036b66a158c2cd6c9f95efb909dfa844717d9de850016c8c8393c25
font_01_sfnt_off000063a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 19448 bytes
SHA-256: ba7465aec2788d3e88ba267ae5510fb97c35805ebfad3a89774c2d831bc96c07

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