Malicious PDF — malware analysis report

Static analysis result for SHA-256 939ba0f5e37e5fa6…

MALICIOUS

PDF

34.0 KB Created: 2021-06-27 22:25:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 52b159d2b38d77213bd5dd13c2609524 SHA-1: aae46153a132235be3842924a696c84eb343dfca SHA-256: 939ba0f5e37e5fa6f0cc0a5f5ec5a1a1f717aa2007041dbc56501e5a117c9ce8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-codes-2021-real-game-hack PDF link annotation
    • http://pustaka.fti.unand.ac.id/repository/roblox-join-players-that-arent-freind-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-place-view-bot-hack-forums_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-hack-servers-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/easy-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/best-free-roblox-skins_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-tix-hack-download_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/tiktok-free-folowers-joker_GM835599320.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-spin-coin-master-hacktoman_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
font_00_sfnt_off00002f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2F 21516 bytes
SHA-256: 211e9542ef068ce0e7f4776e0e2cde85fc4bf5b3f8cc4423a186b215bd3e0603
font_01_sfnt_off00005e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8C 19364 bytes
SHA-256: 58b5540d62ffcbcd0cd09a8102d97fc092b94db7ea089f1030660d7870c6f7c3

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