Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3a472f61ad148c…

MALICIOUS

PDF

36.0 KB Created: 2021-06-17 18:42:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e04407472441c580e26588a8528c97f0 SHA-1: aad3815bb1a41b4a0daed0f5be3e1591171bcf2f SHA-256: 4a3a472f61ad148c09ff2d35bab95e89289e74aa043ad7a58d3e9bbc0fbc50ba
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a lure related to 'free game hacks' and 'free accounts' to entice users to click on embedded links. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly suggests this is a malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a likely attempt to redirect the user to a malicious site for further exploitation or download of a payload.

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-roblox-accounts-with-bc-2021-game-hack PDF link annotation
    • http://ghi.dk/billeder/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://ghi.dk/billeder/pokemon-go-free-kanto-ticket_GM1094591345.pdfIn PDF document text
    • http://ghi.dk/billeder/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://ghi.dk/billeder/free-robux-app_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://ghi.dk/billeder/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/pubg-770-uc-ne-kadar_GM1330123889.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/minecraft-bedrock-server-hosting-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
font_00_sfnt_off0000340c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x340C 22580 bytes
SHA-256: 7f310e364af60ba1c0d660a605610771fac50300b53dfcc4e34358449298f562
font_01_sfnt_off00006627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6627 19592 bytes
SHA-256: 67c220b4028659106785ccad11fc2b0dc0ca56d328f87776cf27ad897a434787

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