Malicious PDF — malware analysis report

Static analysis result for SHA-256 73eafe91e5804936…

MALICIOUS

PDF

42.6 KB Created: 2021-05-12 11:31:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7a4a56a553d8cca9a5de7515bfb92b61 SHA-1: a7fc5161379e0510ea12a8c86d1cf12c14d3a24e SHA-256: 73eafe91e580493673949afee47685c9ffac03153707d4fa4ded824631c09b7d
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA to trick the user into clicking a link, which is a common social engineering tactic. The embedded URL points to a resource likely offering game cheats, suggesting a lure for downloading malware. While no scripts were directly extracted, the PDF structure and heuristics indicate it's designed to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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/406889139/coin-master-free-spins-coins-game-hack
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/coin-master-32-hack-apk-download_GM406889139.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/roblox-source_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-admin-in-roblox_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-robux-without-offers_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-robux-for-kids_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-robux_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-twitter_GM406889139.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/coin-master-free-chest-link_GM406889139.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/robux-win_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/minecraft-clipart-free_GM479516143.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/earn-free-robux-on-roblox_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-robux-com-no-verification_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/robux-hack-me_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/collect-free-spin-linms-coin-master_GM406889139.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/coin-master-money-hack_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/getrobux-ninja_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/roblox-apk-hack_GM431946152.pdf
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-roblox-girl-hair-not-a-model_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c15.bin
8ba4f68f2034cae518f80f374e485304c177660244ee19fa1689caf282b92310		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C15 24856 bytes
font_01_sfnt_off0000855b.bin
7b855ef2bb944b5b370c61480927ccad63ff31bdbf820bc1f0da9d35a10f5fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x855B 17884 bytes

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