Malicious PDF — malware analysis report

Static analysis result for SHA-256 df151a65d5a748ad…

MALICIOUS

PDF

44.3 KB Created: 2021-06-09 07:07:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0c7850af780baf856ce38638e80b1d50 SHA-1: 16007c20945441be7ca07503219d6d3dcb7852a8 SHA-256: df151a65d5a748adbed549642d2a7034c7a4d8b423b88cdec36786b28bc483a3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a link farm of 28 external PDF links, many of which are SEO-optimized for terms like 'free robux' and 'coin master hack'. The presence of a 'download button' heuristic and an embedded URL suggests an attempt to lure users into downloading further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-robux.clubor-game-hack
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/easiest-money-hack-febuary-roblox-rocitizens_GM431946152.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-robux-without-downloading-apps_GM431946152.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/coin-master-hack-https-coinms-net_GM406889139.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-robux-without-doing-anything_GM431946152.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master_GM406889139.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/how-to-earn-free-robux_GM431946152.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/roblox-ro-ghoul-how-to-get-a-different-for-free_GM431946152.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/tiktok-follower-bot-free_GM835599320.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-robux-come_GM431946152.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spins_GM406889139.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/ways-to-get-free-robux_GM431946152.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/roblox-mm2-hacks-2021_GM431946152.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-minecraft-alt-generator_GM479516143.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/roblox-badges-hack_GM431946152.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-roblox-beanie_GM431946152.pdf
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-tiktok_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000502a.bin
87aca345e41464464d179a7202264e7d57dd0861d265b3f20096008a5c8caa26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x502A 25176 bytes
font_01_sfnt_off00008ac2.bin
7b2e7b67891c3dd896a6103b021781018524679529f950fbd441f8ecbb80920d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC2 18188 bytes

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