Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eca1a3b10dc565a…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 14:04:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 44e2f3cbcb1e1363a5a9bb54ae058908 SHA-1: 8a4b8f4999c3a8ec6e1fc49790c6876a5119000e SHA-256: 2eca1a3b10dc565a0e7bebe6d10aab81063108868d846e5ce1ebb77a4a3f2096
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are structured as game hack generators or free item lures. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm or SEO manipulation tactic. The primary lure appears to be related to obtaining free currency or items for games like Coin Master and Roblox, directing users to potentially malicious or scam-related 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.tw/app/406889139/how-to-get-free-coins-in-coin-master-game-hack PDF link annotation
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/booga-booga-roblox-hacks-free-download-2021_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/how-to-look-like-naruto-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/roblox-free-admin-for-roblox_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/free-roblox-clothes-and-hair_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_off000034a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34A6 22848 bytes
SHA-256: f05a21fcf90ed9e22cca02ca4a89b034ad4dc2be3b35874dd77dd2c3bfda4283
font_01_sfnt_off00006788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6788 18164 bytes
SHA-256: 9fab875a536b983537b9433768b1ea3e5c55ad95c87001a66781b974c182b662

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