Malicious PDF — malware analysis report

Static analysis result for SHA-256 294138801c413eca…

MALICIOUS

PDF

42.4 KB Created: 2021-05-17 16:35:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: aa6e08f6062dd244a03b2ecfec0b8bad SHA-1: 735928bc175ccff5880ef97ff5472196667067ae SHA-256: 294138801c413eca927a8246d2315372fc3f1b3650a7c605e74a27884cf5fa89
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially harmful content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a deceptive attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/431946152/free-robux-codes-2021-game-hack
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/coin-master-daily-free-link_GM406889139.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/hacks-for-coin-master_GM406889139.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-roblox-clothes-codes_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-with-no-verification_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/robux-sites_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-coin-master-cards_GM406889139.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-com_GM406889139.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/best-way-to-get-robux_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-coins-coin-master-no-human-verification_GM406889139.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-spin-coin-master-online_GM406889139.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/hack-coin-master-343-apk_GM406889139.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-2021_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/roblox-play-as-guest-free_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master_GM406889139.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049d7.bin
9d94424815af5d45f598107baa1c4f556aab3ed5028cdc3c293ffe76e7fd7469		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49D7 24456 bytes
font_01_sfnt_off00008217.bin
0c0011b59677f21f59199ad7d2a82948105ed154610022cedcbab6f052c91d55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8217 18588 bytes

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