Malicious PDF — malware analysis report

Static analysis result for SHA-256 171f16751d65452c…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 16:49:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 59e54f244eeb4c80d0cf48696fff0e87 SHA-1: 23513762f9f7e9cd97f8cb1ad0d2ca1378dea6e8 SHA-256: 171f16751d65452c4850776d84f3265a5ddd6b3188272f30b4a9b8cbb14c7fe4
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of links, many of which are SEO-optimized and point to game-related hacks and cheats. The primary URL, http://netcdn.tw/app/406889139/coin-master-fan-page-game-hack, is a clear lure for users seeking game exploits. The document's structure and content strongly suggest it's part of a link farm designed to drive traffic to potentially malicious or scam 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/coin-master-fan-page-game-hack PDF link annotation
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-hack-on-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/www-roblox-com-sign-up-for-free_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/robux-games_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/hacker-egg-letters-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/fly-hack-download-for-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-make-a-free-admin-game-on-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/500-rebirths-at-a-time-hack-magnet-simulator-roblox-script_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/roblox-fashion-famous-vip-free_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/como-usar-pastbin-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/robux-hack-me_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_off0000302f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302F 22704 bytes
SHA-256: 121ec1d31cb0e27918e602ced788b1b5168dd2a1ba3a2c520a354dd07e736f99
font_01_sfnt_off00006306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6306 18152 bytes
SHA-256: 9fe2869cca72dd4eec0fd810115ded93cbe686d457a153e4230a47e490bd9cc8

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