Malicious PDF — malware analysis report

Static analysis result for SHA-256 246f3a969905da7a…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 18:18:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7d85e9affbc994f6093e15ebbc2eee99 SHA-1: 168e70fb824d871a422bb497b99ce78c05a3babd SHA-256: 246f3a969905da7a1bf60230b272b115560391b608cc754b10b3bb005d1e7775
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are related to obtaining free in-game currency or items for popular games. The primary URL, http://netcdn.tw/app/431946152/how-do-you-get-free-robux-on-roblox-game-hack, suggests a lure for potentially malicious content. The ML classifier also strongly indicated maliciousness, supporting the assessment of a phishing or malware distribution attempt.

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/how-do-you-get-free-robux-on-roblox-game-hack
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-spin-link-of-coin-master_GM406889139.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/lazyblocks-com-robux_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/hacker-robux-free_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/is-minecraft-free-on-pc_GM479516143.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack-on-computer-2021_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-roblox-app_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-pet-food-on-coin-master_GM406889139.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/roblox-create-free-group_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/download-coin-master-apk-hacked_GM406889139.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-cracked-minecraft-server-hosting_GM479516143.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/hack-coin-master-game-apk_GM406889139.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-clothes-on-roblox-using-codes_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-group-roblox_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/roblox-jailbreak-teleport-hack-download_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/rich-free-roblox-accounts_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-hair_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f03.bin
1b008fda86a42d87b58c2db952a505a64403689cc94939ea1d06f02d4931ea43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F03 22352 bytes
font_01_sfnt_off000060c5.bin
bfe8901ed3b01612589fbf5cddaaa2e97b8ca06efec900f58c792d736f26eaab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C5 19388 bytes

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