Malicious PDF — malware analysis report

Static analysis result for SHA-256 c16868ee5463ac97…

MALICIOUS

PDF

44.3 KB Created: 2021-05-16 10:47:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0ac9e06cbf8fa2ee588c1885d3a9f304 SHA-1: 01857bd18628a1733b07f096a03d1211261b6794 SHA-256: c16868ee5463ac976b7171c9e76b7d999834c06c3524715efe673f2534028d0a
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link, which is a common social engineering tactic. The embedded URL leads to a page offering 'easy ways to get free Robux', further reinforcing the lure. The ML classifier also strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/easy-ways-to-get-free-robux-game-hack
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/how-to-get-free-skins-in-minecraft_GM479516143.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-500-free-spins_GM406889139.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/how-to-get-free-items-on-roblox_GM431946152.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-ios_GM406889139.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/hacks-for-coin-master_GM406889139.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-online-hack-no-survey-no-password_GM406889139.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-robux-websites-no-human-verification_GM431946152.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/roblox-land-free-robux_GM431946152.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-pe-for-free_GM479516143.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/mosttechs-coin-master-free-spins_GM406889139.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-no-human-verification_GM406889139.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-hack-org_GM406889139.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link-march-2021_GM406889139.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/haktuts-free-spins_GM406889139.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/ear-free-spins-for-coin-master_GM406889139.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-fire-coin-master_GM406889139.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-generator-hack_GM406889139.pdf
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/no-verification-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c7c.bin
6aa06932cec9c83a63ebb0116c76756a58411210a922410201017a3eb12673b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C7C 26080 bytes
font_01_sfnt_off00008967.bin
ff2b5f5648817baecf5754646eae61914eefadf3856a555e8e6cbc13d6b08405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8967 18724 bytes

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