Malicious PDF — malware analysis report

Static analysis result for SHA-256 90893f3138584379…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 14:38:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: abdbfeb3651f686759815927da7171d0 SHA-1: 6ffacf727cf198f7c3d4a8be8bc965d780e8024b SHA-256: 90893f313858437931de36b8e70fae4539cc85cdb745a4ddec4bf14605838f29
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/free-400-spins-coins-master-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-robux-generator-tool-2021-roblox-robux-hack-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-generator-addon_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-adopt-me-how-to-get-free-oers_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-auto-clicker-for-mac-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hack-how-to-load-lua-gui_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-coins-in-roblox-mm2_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-make-a-free-game-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-faces-on-roblox-2021-on-computer_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3145 22736 bytes
SHA-256: 7f2cbb494ad74a191d5f89c3cc53d65cbb96bb4e6fb47091cd76502dd2096db6
font_01_sfnt_off00006455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6455 18408 bytes
SHA-256: 4e66a57bfe738047e6df63fd9189a21fbdddd8af32605bc7d5792be520b928d4

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