Malicious PDF — malware analysis report

Static analysis result for SHA-256 be907dec1dc5aade…

MALICIOUS

PDF

35.7 KB Created: 2021-07-09 09:13:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dc1e69ff0f507349ad110e380d6daba3 SHA-1: 6641e3921fd7bb0d76908452510bd9d9ff717a6c SHA-256: be907dec1dc5aade14d6cf349b45c8ef2b39e9a17bc6561d1362578400102bc4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a prominent call-to-action related to free virtual currency and game cheats. 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 websites. The document body text directly mentions 'free robux' and includes a URL that appears to be a lure for such content.

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/431946152/free-robux-no-human-verification-no-survey-game-hack
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-twitter_GM406889139.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/minecraft-mods-download-free_GM479516143.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/google-coin-master-free-spins_GM406889139.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/how-to-coin-master-spin-hack_GM406889139.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/today-coin-master-free-coins-link_GM406889139.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/roblox-mad-city-cheat-to-kick-people_GM431946152.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-no-inspect-2021_GM431946152.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-exe_GM406889139.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/get-roblox-items-free-crome-addon_GM431946152.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/hacker-face-roblox_GM431946152.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/free-coins-coin-master_GM406889139.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/does-roblox-have-an-anti-cheat_GM431946152.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/https-www-roblox-com-free-download_GM431946152.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-verification_GM431946152.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/roblox-robux-hack-2021-no-human-verification_GM431946152.pdf
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/robuxhub-net_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000336c.bin
84d6bb62b2e98a5229beff5594362e40afd8e265ec8ec6b728137d68454923c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x336C 22296 bytes
font_01_sfnt_off0000650f.bin
09331f1d479b06632facb78648812f66193fe8c97927eaaaed4247988ab7ba01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650F 19628 bytes

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