Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d715c680690bfb…

MALICIOUS

PDF

35.6 KB Created: 2021-07-06 02:28:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 65fba7fed1b301c68e7383440b68b943 SHA-1: d8b5b11e23b3b03f31c97f1b6cae8f6f4a00e0eb SHA-256: 59d715c680690bfb18d3dbb7165406747b6d816be08978fef68502002aba5777
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure, advertising game hacks and free currency to entice users. It contains multiple embedded URLs, with the primary one leading to a redirector hosted on netcdn.tw. The ML classifier strongly indicated maliciousness, and the PDF's structure and content align with social engineering tactics to drive users to potentially malicious sites.

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/431946152/how-to-hack-to-get-robux-game-hack PDF link annotation
    • http://library.imz.or.id/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/redline-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/your-life-free-trial-has-expired-roblox_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/lifting-simulator-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-trade-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/hacking-roblox-accounts-sites_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-ultimate-driving-westover-islands-how-to-get-free-cars_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/hacker-roblox-t-shirts_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/ban-script-for-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-download-roblox-studio-20-beta_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/get-free-robux-with-promocodes_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-games-online-on-robloxcom_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/cheat-roblox-granny_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-facebook-hack_GM406889139.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_002_off0000308b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x308B 23608 bytes
SHA-256: bd9b53abcf8137e93c208fa7d02d42bd3f0267e7a01ab88f4c507f626c64388f
font_01_sfnt_off00006627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6627 18992 bytes
SHA-256: 689b3580a88e4ac2b5c71224fd8e7c25284750e13a7ef80e9d6f951111b623c5

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