Malicious PDF — malware analysis report

Static analysis result for SHA-256 87bbfb206f06dda2…

MALICIOUS

PDF

40.8 KB Created: 2021-05-13 05:36:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d38dfb289856887f0b5fd9366eef7246 SHA-1: d00491918dbfdc4bedff161465c124dd5fb7b599 SHA-256: 87bbfb206f06dda2845ae599b8a1919af7b0e6397b7d7bac26d1c037dfca8a04
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links to websites that appear to be part of a link farm, promoting scams related to free game currency and spins. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to drive traffic to potentially harmful sites. While no scripts were directly extracted, the PDF structure and embedded links indicate a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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.xyz/app/431946152/no-robux-game-hack
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/free-robux-games-on-roblox_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/free-robux-games_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/minecraft-pe-free-download-android_GM479516143.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/how-to-get-free-followers-on-roblox_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/what-is-coin-master_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/real-coin-master-free-spins_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/minecraft-realms-free-codes_GM479516143.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/hack-coin-master-site-rssingcom_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/robux-online_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-spins_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/free-coin-master-spins-for-today_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-apk-hack-2021-ios_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/minecraft-bedrock-hacks-windows-10_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000464d.bin
4f5145a478f838af5e23664caca7a5778eba0748cb9df6dea2128bd66b988912		 pdf-font-stream PDF embedded font (sfnt) at offset 0x464D 24356 bytes
font_01_sfnt_off00007e45.bin
096069712db6b5d6732bcb1e197377aec390e00cd57ea8fb2786eb315a05e75d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E45 17852 bytes

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