Malicious PDF — malware analysis report

Static analysis result for SHA-256 98adbcacf704cf50…

MALICIOUS

PDF

33.5 KB Created: 2021-07-06 07:12:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f3130fd9fd697140abe140e24e1c3600 SHA-1: 6f187691d85f9a277a7bbdd98b41ab35aef3f432 SHA-256: 98adbcacf704cf50c1c295d994506f93c9691933d9b734a2df63cf2aeedf630f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/get-free-robux-without-human-verification-game-hack PDF link annotation
    • http://lib.kesdammedan.ac.id//repository/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-de-la-hoya-pants-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-best-free-avatar-iddeas_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/funny-roblox-avtar-free_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/www-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-roblox-account-checker_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-to-hack-roblox-btools_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-hack-cheat-tool_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/can-you-trust-rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/cheats-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-hackcom-xyz_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_off00002a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A82 22380 bytes
SHA-256: dadc4521f681295228742dc88a3f5f3c451e68f8778896d1a8c56aa8d73cd714
font_01_sfnt_off00005c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4D 19700 bytes
SHA-256: e8bf7ca05401f798ebc0703cbcc09d220ccc7d22796280ca6a3dd60c700d0f91

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