Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b00fb1884437f3…

MALICIOUS

PDF

36.4 KB Created: 2021-07-05 17:25:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8e41c5e0698c1b3691b1f0f5b59af3b0 SHA-1: 8db53a49dd267bb857daa97b4e2876b47901ce4e SHA-256: 93b00fb1884437f3e276934ae6cf95b8ca4fa38c3acfc8af6eecee9f51e40842
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to direct users to external URLs, which in turn host a large number of SEO-optimized PDF links. The primary heuristic indicates this is a link farm designed to generate traffic or potentially lead users to malicious content. While no scripts were extracted, the PDF structure and embedded URLs suggest a malicious workflow aimed at user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/479516143/how-to-hack-a-minecraft-server-and-make-yourself-op-game-hack PDF link annotation
    • https://perpustakaan.stifar.ac.id/repository/roblox-how-to-free-robux-for-free-with-out-hacking_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-thumbnail-in-roblox-studio_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-join-roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/termianl-railway-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/cheat-codes-pegboard-nerds-roblox-music_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-on-ipad-mini-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-someone-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-rblx-market_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-on-boombox-island-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/giveaway-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-robux-hack-generator-no-survey-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_off00003525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3525 23812 bytes
SHA-256: bc2573c39430d138710b3d106516fdefe0887990ff9036705f59020a96c73629
font_01_sfnt_off00006903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6903 19172 bytes
SHA-256: de5122dd7140aefbd5e4119096f7d50e8a9323c0cccb37eb35bf32659f598f97

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