Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89580d4e39983b2…

MALICIOUS

PDF

44.5 KB Created: 2021-06-11 13:28:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 43c9643696678a8724697fa197f23948 SHA-1: 698dd508061387abd895a4978fb8f4ea095b18bd SHA-256: e89580d4e39983b262b0db44731819e18ff2a111a4cca09ef7a7fa71aba78f5d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure related to game hacks and free generators, directing users to a malicious URL. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to potentially harmful content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-robux-easy-2021-game-hack In PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/village-4-coin-master_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/robux-online_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-home_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/roblox-character-boy-free_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/roblox-promo-codes-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_off00005191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5191 24132 bytes
SHA-256: 9e0a456b6ece64fa1c07c852013139b42cda2c74443517efd65bd2f4360297a2
font_01_sfnt_off000088cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88CB 18992 bytes
SHA-256: de6d509e754b97d1cbfdf50dc47313f23d656ee70306d9e4bb9ef752feb051a6