Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45fef902ff3d725…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 11:18:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f1d28480b3be026c13269c469dfe9844 SHA-1: 5fd19c0f0c2d6debac59a14867f106cb13439245 SHA-256: f45fef902ff3d7258be6e39aa6b0f46031fbdeb4aaa524ea4e164e3a989b04d8
102 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one directly to a 'minecraft-wurst-hacked-client-game-hack' download. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm designed to drive traffic to potentially malicious sites. The ML_NYX_PDF_MALICIOUS classifier also strongly flagged this file, reinforcing the malicious nature of the 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/479516143/minecraft-wurst-hacked-client-game-hack
    • http://elibrary.smknesbu.sch.id/repository/free-coins-and-spins-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/what-games-give-you-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-gift-card-codes-2021-live_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-now-for-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-cp_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-make-a-roblox-cheat-engine-exploit_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-hacker-shirt-template_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-daily-coin-master-coins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-extra-spins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-clothes-on-roblox-2021-mobile_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/conquer-3-money-hack-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-pants-and-shirts-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-vip-server-on-roblox-jailbreak_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-lobby-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-girl-acounts_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/secret-robux-hack-subscribe-to-make-it-works_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/best-roblox-free-roblox-avatar_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/como-conseguir-robux-gratis-en-roblox-2021-sin-hacks_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-on-roblox-by-playing-games_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030f2.bin
3aff5806fde6a485d2e37b5c5e7da45812e2d24ab1529754ed1343301fd9171b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30F2 22176 bytes
font_01_sfnt_off000061db.bin
e53125b5c7bb1d2ed45fc012e7c103c06ddfc4678a41cf369a31d21e3b84c15b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DB 18612 bytes

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