Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12eb61e878d323e…

MALICIOUS

PDF

33.8 KB Created: 2021-06-28 05:08:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9e76e5bb96ae1e975d9c95b9cb0052e3 SHA-1: 0bb3fc72293b39ca9b48d83bfcb06f794484490e SHA-256: f12eb61e878d323e614aff7562e666a743c770bd2f9076b36333c3d20f29cb96
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of offering game hacks and free in-game currency to trick users into clicking malicious links. The document contains a large number of external links, many pointing to URLs that appear to be part of a link farm designed to improve search engine rankings for scam-related terms. The primary goal is to redirect users to potentially malicious websites.

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-in-mad-city-roblox-game-hack PDF link annotation
    • http://repository.ummy.ac.id//repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-robux-no-verification-no-offers_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/case-clicker-hack-2021-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/20219-walkspeed-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-fishing-simulator-hack_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-cheat-engine-commands_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-scripting-educarion-for-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/hack-client-roblox-may-2021-injectors_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-big-paint-ball-executor-free-download_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-hack-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-get-freerobux-real-working-2021_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_off00002db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB9 21604 bytes
SHA-256: cac3ee8d0d1d88bcb971ecc2ab186afcaa4e2204209a3edaf41bb59190dfe394
font_01_sfnt_off00005d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D27 19596 bytes
SHA-256: c177f05a960fb188431d13069b34d8a0b630c772d7ecf8bbfec1321395967ec1

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