Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e64d95ed823e62…

MALICIOUS

PDF

35.7 KB Created: 2021-07-08 19:41:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e455375ab551edbe06d0e6fd94a224e3 SHA-1: 537b138873eae4537bd1cabd7de374881c9ee764 SHA-256: 66e64d95ed823e62c5db98a4309047a67f0df9497d46c5ec11631908305d3229
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to game hack generators or related content. The primary lure appears to be 'Coin Master Free Coins And Spins', directing users to a URL that likely hosts a malicious payload or phishing page. The document's structure and content strongly suggest it's part of a link farm designed to attract users searching for game cheats.

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/coin-master-free-coins-and-spins-blogspot-game-hack PDF link annotation
    • https://perpustakaan.stifar.ac.id/repository/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-on-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-roblox-gamecards-secret-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/corn-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-dll-hacks-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/1-robux-every-second-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-extreme-hack-net_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-outrageous-builders-club-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-rs-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.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
stream_002_off000031a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A6 23912 bytes
SHA-256: 2ac11378e81107acd7e82660cb161e988419f85fb71d5422af77433b83fe16b9
font_01_sfnt_off000067e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E2 18636 bytes
SHA-256: 92dea7b5ac67a14139330f2af12a1750e7006eee2ca7b9a0e47e6ec1f486aa27

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