Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d24cdbad86dba9…

MALICIOUS

PDF

49.3 KB Created: 2021-06-11 12:19:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5efece2f8eba24df2b529768ffe77f24 SHA-1: 6e0e871b5c68129a1cca1582d1832f2404070305 SHA-256: b1d24cdbad86dba9404d70d6a65de4e7fac055be7ddf5c7fc64673d1c2144509
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a high heuristic firing for linking to game hack generators, strongly suggesting a social engineering lure. The primary URL, 'https://netcdn.tw/app/431946152/how-to-get-free-coins-in-roblox-assassin-game-hack', is a clear indicator of this deceptive tactic. While no scripts were explicitly extracted, the nature of the content and the embedded URLs point towards a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/how-to-get-free-coins-in-roblox-assassin-game-hack PDF link annotation
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/noob-vs-pro-vs-hacker-vs-god-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/how-to-hack-roblox-high-school_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/roblox-hack-v2-11-download_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5209 24988 bytes
SHA-256: d1238028d6c87a21304d06ef7289a042ba3069c0023f4b859ab50a0ddd00cc38
font_01_sfnt_off00008be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE1 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_02_sfnt_off00009d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D52 18564 bytes
SHA-256: 53728c49461aaa126e01a6bb08a2a03d93490b5a8227da0aa4339c6ce88cfc6e

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