Malicious PDF — malware analysis report

Static analysis result for SHA-256 871a5a86c94782d0…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 12:40:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d7a4f421c628901969b422e28f6461f5 SHA-1: b20e198ec0ec57fce08cf39c254887ecd44f9f74 SHA-256: 871a5a86c94782d042d2e55891746d026db0a2b2d74f18329f13886b5e31d30c
142 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are structured as SEO link farms for game-related cheats and hacks. The document body, though partially obfuscated, contains a URL pointing to a potential game hack download. The 'SE_CLICKFIX' heuristic indicates the document may instruct users to execute commands, further supporting a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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 https://netcdn.online/app/479516143/client-minecraft-game-hack
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-tool_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-may-11-2021_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-promo-codes-free-robux_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-mast-hacks_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/free-spin-link-coin-master_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-hack-without-human-verification-or-survey_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-robux-no-downloading-apps_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/minecraft-education-edition-free_GM479516143.pdf
    • http://library.itekes-bali.ac.id/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/free-roblox-hack_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-apk-35-18_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/free-robux-website_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-links-blogger_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-zone-free-robux_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-coin-master-spins-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051dc.bin
9814e791a66a7addf53c3864bb1efe556a8b9eaf918f511d6d09c83dbdd473b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51DC 31484 bytes
font_01_sfnt_off000091f7.bin
5ce6a379ae9f46d42512ba88e57e1f5186d7f60265a685918f3434c96255be0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F7 17644 bytes

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