Malicious PDF — malware analysis report

Static analysis result for SHA-256 627f2432b9c931cc…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 11:11:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f4274e446157a94590ebf9b1f131837f SHA-1: 0ee2637d28bec6c6b89ff56dde84ecc79d2a5eb3 SHA-256: 627f2432b9c931cc4c265c7e68967146cb6e8041148ce023d08fc0bd6bd96dbf
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a lure for game hacks and redirects to known malicious infrastructure. It also instructs the user to copy and paste content into a shell, indicating an attempt to execute commands. The presence of multiple redirector links and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.online/app/479516143/minecraft-hacks-wurst-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/mosttechs-coin-master-free-spins_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
font_00_sfnt_off000052e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52E9 26092 bytes
SHA-256: f4c3a58ab90d4405c95c8ea1232b4b4ec88bacf976a5c19dfc74ad75115d4b4e
font_01_sfnt_off00008ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECD 18076 bytes
SHA-256: 3e7497e6bc4bf84e5186ee2c608eda5b15e7e8e7c6854cdd6eb66a0ec10d8832

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