Malicious PDF — malware analysis report

Static analysis result for SHA-256 36bf43c6206a4c39…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 07:55:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d3c02e24e75a9d7d2edc299ea842ba05 SHA-1: 581cc9ad5c876ffdbe39e23ae710733161fe774d SHA-256: 36bf43c6206a4c39b38f4d037647c43b36da5ed211348a90e89356567dbba5e9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link and text related to 'Robux Generator Without Human Verification', a common lure for scams. This link, http://netcdn.tw/app/431946152/robux-generator-without-human-verification-2021-game-hack, redirects to a potentially malicious site. The ML classifier also flagged this PDF as malicious with high confidence.

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.tw/app/431946152/robux-generator-without-human-verification-2021-game-hack PDF link annotation
    • http://perpus.wdh.ac.id//repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/indieun-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/como-hackear-cuentas-de-roblox-con-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/claim-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/fairy-tail-online-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/www-robux-us_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-com_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-account-hacked-no-email-address_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-flame-cheat_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-com-roblox_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_off00002ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF6 22292 bytes
SHA-256: 7425a080956c0357bb27f15a9ba8b18bf70bb91ea66173db2c767639ff0cbb67
font_01_sfnt_off000061ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AB 19936 bytes
SHA-256: ea759af22d090c98ec9b2735e9990e38e48e197643852080404e6bc21dc44a84

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