Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb01a0862905949…

MALICIOUS

PDF

33.7 KB Created: 2021-06-29 06:34:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3ed3a730bcc33f7057eb411e5896a30d SHA-1: 22406d970ac72df83c5c10db2a69f7476a06c205 SHA-256: 4eb01a0862905949debe7d67cfc4852069ceba7dc6ce9190704ec9da1bc2df87
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document body and extracted URLs strongly suggest a lure for obtaining free in-game currency (Robux) for Roblox, a common phishing tactic. The presence of embedded URLs pointing to various hack-related PDFs indicates a likely attempt to redirect users to malicious content or download further malware. While no scripts were explicitly extracted, the ML classifier and heuristic firings confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/robux-hack-tickets-net-game-hack PDF link annotation
    • http://lib.vipklh.ru/repository/roblox-get-free-gear_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/make-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-clothes-from-other-users-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hacks-in-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/jojo-characters-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-roblox-account-with-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/fly-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-clothes-on-roblox-iphone_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/flame-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-hack-side_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/is-windows-10-minecraft-free_GM479516143.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_off00002de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE0 22164 bytes
SHA-256: b170fa528553613f71f662d8e3c0f3df084d3343282f1d61f1d7c635471d4736
font_01_sfnt_off00005ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECD 18948 bytes
SHA-256: eecdda81133467814a4dbd1557769757b2d100e5ebcbea041068dd12ce43bc3c

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