Malicious PDF — malware analysis report

Static analysis result for SHA-256 0891375416ced500…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 10:58:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eab91c160a8f07edc0ee24ac2dc0c001 SHA-1: da10a66d3ae297deb6a2d16a6488a76e381dcbfe SHA-256: 0891375416ced500afcdf78736bd1eeeef84e55d9cb8c1071d5e4b3489cbadcc
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/daily-free-spin-coin-master-link-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-ipad-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-account-generator-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-but_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-virus_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-glitch-ios_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-got-hacked-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/cool-free-outfits-in-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hack-para-mocap-dancing-vip-gratis-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-unlimited-money-on-roblox-pool-tycoon-4_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-download-mac-os-x-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-2021-december_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-supreme-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/rbx-gg-free-robux_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_off00002f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F66 22920 bytes
SHA-256: f31d3f628dd96ccf0cd8e5c5a7d2b618a875b91e35602eb035270a27cd4a68a6
font_01_sfnt_off000062fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FD 18768 bytes
SHA-256: d697be63ee21a3cec570d2e62d957a88a7de4f3367accd652b11710ad4160183

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