Malicious PDF — malware analysis report

Static analysis result for SHA-256 79486c1baf24d5e8…

MALICIOUS

PDF

44.4 KB Created: 2021-06-09 15:47:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 948e7ffc6dfbed03b1fbc3badb0b4e58 SHA-1: 186ed73b1b32935728bb65c220a3c1929c3cc322 SHA-256: 79486c1baf24d5e8600fdc389d32145ac9686ae19c57add20ffb1dd22f345e8a
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 0.9865

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 https://netcdn.tw/app/431946152/how-to-hack-cookie-clicker-roblox-game-hack PDF link annotation
    • http://perpustakaan.poltekom.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-tiktok-views_GM835599320.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-giver-online_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/tiktok-free-followers-apk_GM835599320.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/pubg-uc_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-without-survey_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
stream_004_off000052d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D5 24188 bytes
SHA-256: acd904902880c99ffccf5d6dbac0865d1313736f6e4400ed94acaa092192db55
font_01_sfnt_off00008a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A24 18468 bytes
SHA-256: 298590a9ce5c02f808feb172382078e9fd174cd856fd16ad8610b678560c9049

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