Malicious PDF — malware analysis report

Static analysis result for SHA-256 9142408397a5a6f2…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 11:49:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 82b1db32bdbe8dea9f5f0b7eb9b1b1ab SHA-1: aababa6f2132ff0c12c32e1ecc39a6e6e7e869ec SHA-256: 9142408397a5a6f249381102951f772a07d9e1fe3837bc9ba9eec27cf1a06f8f
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.tw/app/406889139/coin-master-3rd-village-free-2021-gift-card-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-horror-games-multiplayer-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-gte-free-robux-easy-and-fast-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/10-ways-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-girl-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-helicopter-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/has-roblox-been-hacked-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/get-free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-net-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/elite-hackus-exec-roblox-wd8_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-rebirths-roblox-uncopylocked_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-in-app-purchases-roblox-pc_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-free-download-no-virus_GM479516143.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_off00002ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBF 22340 bytes
SHA-256: 1d854b60037125188581ac29780a2e60f75da5f12a8742913a6acd1b15072e66
font_01_sfnt_off0000603b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603B 18956 bytes
SHA-256: bdb9740de69c1241ca5e9a478756cf5f52269e036c7623e09abf4ff81ed82c51

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