Malicious PDF — malware analysis report

Static analysis result for SHA-256 350d39f67b06688d…

MALICIOUS

PDF

44.4 KB Created: 2021-06-04 01:31:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ed455cd55179a0c91fb654e426d86761 SHA-1: 543dcc58e3f35e62536fa4a625a6e1f00eb35308 SHA-256: 350d39f67b06688d2625f315448e5bb361343d4a9feab56a7c439c88d99bec24
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a 'free game hack' lure to entice users to click on external links. The PDF contains a large number of links, many of which appear to be part of an SEO link farm, directing users to pages that may host further malicious content or scams. The ML classifier strongly indicated maliciousness, supporting the observed link farm and redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/479516143/minecraft-linux-free-game-hack PDF link annotation
    • http://pustaka-smpn3tpi.com/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000522c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522C 25848 bytes
SHA-256: f9536d03992618403be7221a48ace6cf492778243d1d8133ebec22714fad0770
font_01_sfnt_off00008c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C39 17916 bytes
SHA-256: 0b348397e82be555af1d528ddcedc25e065996eb02ebce8cb51620ec9a86be7a

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