Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5aef34a7cf43dc…

MALICIOUS

PDF

34.9 KB Created: 2021-06-22 01:42:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c5bfa5924ea86604abef8de789b01c71 SHA-1: 6a1919391c8418517e4bd100ec6c00bbc0554d13 SHA-256: ac5aef34a7cf43dc5307c89e9cdd06888f865141da97928ce439fe0aeb219642
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are structured to appear as SEO-optimized content related to free in-game items for popular games. The heuristic firings indicate a link farm designed to lure users to external sites, likely for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious campaign.

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.co/app/431946152/how-do-you-get-free-roblox-game-hack
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-pet-food_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/get-me-robux-for-free_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/spin-link_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/roblox-arsenal-hack_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-50_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/roblox-land-free-robux_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/roblox-free-robux-website_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-modded-minecraft-server_GM479516143.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/coin-master-free-spins-facebook_GM406889139.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/roblox-robber-hack_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-verification_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-obc-lifetime-2021_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/www-roblox-com-free-robux_GM431946152.pdf
    • http://e-learning.mialislamiyahckp.sch.id/__statics/gudangsoal/files/coin-master-free-spin-2912-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003251.bin
d48bd496381ee70e4941fbbf0fa2508e13b2cdeb29a4359410ae085228e79309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3251 21788 bytes
font_01_sfnt_off0000623f.bin
ad78cfc62cd8c1b058715f2dc66a6bf5ac5c09636f1ae08381e96b56faa7ef77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623F 19388 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.