Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cfd769a72671dc8…

MALICIOUS

PDF

34.3 KB Created: 2021-06-19 08:12:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 85dedc0c1c8be3be3a801d000f3c1880 SHA-1: a00322eceaf0d72fbc7fddd173a0fd3165942fd8 SHA-256: 1cfd769a72671dc8d9ec5af72c0bc67ad5bc5f0a6d3e7c24a960ef5dadb00c84
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.co/app/431946152/roblox-btools-press-n-script-hack-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/wurst-client-download_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-free-robux-giveaway-live-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/play-free-roblox-com_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-stuff-on-roblox-mobile-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-polyguns-crate-teleport-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-place_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_off00003022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3022 21880 bytes
SHA-256: cc218d7782f41d3c3e1dbdec08148f496a339833dff41d4990c1aa07084ce252
font_01_sfnt_off0000606b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606B 19212 bytes
SHA-256: 58cf2e39ce523ce87a7926f150551c61b126a687f7b69f8902291f7da5f07ca1

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