Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94bcd11ce237059…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 02:00:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 48fa7679caad631066629c1ea85be1cf SHA-1: ff5193f1b416f9141c261f298cbc4c8edf0e821f SHA-256: f94bcd11ce23705965d844f37bbca2b393cd28f3fa56d8ec7dd205eea9fd8e40
102 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are SEO-optimized and point to pages offering free in-game items or currency. The primary URL, http://netcdn.tw/app/406889139/coin-master-link-daily-get-free-spins-amp-game-hack, is likely a lure to a phishing or scam page. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-link-daily-get-free-spins-amp-game-hack
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-wings-in-roblox-2021-may_GM431946152.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-website_GM431946152.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/rbxoffer-com-free-robux_GM431946152.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/can-you-host-a-minecraft-server-for-free_GM479516143.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-free-apk_GM479516143.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/how-to-earn-free-spins-coin-master_GM406889139.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-robux-cards_GM431946152.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/real-minecraft-for-free_GM479516143.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/robux-free-account_GM431946152.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-easy-robux-generator_GM431946152.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-spin-sites-for-coin-master_GM406889139.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/how-to-duplicate-coin-master-spin-hack_GM406889139.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/coin-master-link-for-spins_GM406889139.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/sites-to-get-free-robux_GM431946152.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/is-minecraft-vr-free_GM479516143.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/minecraft-free-online_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000361b.bin
a5297fa9931c77d5b2b6e57b4cc135cc39a60650b3fb6d893094d636e23cea70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x361B 22080 bytes
font_01_sfnt_off00006726.bin
a6b0f614ac39e0ea25c1b471df05359c20ad0f84406a652126b1030dae4d287b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6726 19024 bytes

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