Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92caedee1c0404f…

MALICIOUS

PDF

43.6 KB Created: 2021-05-21 16:13:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4fc5c59879a6139588d0cb40d3ee1fc6 SHA-1: 6c2d2fdde8e8df648d598b92f0b4287bd74dfc90 SHA-256: f92caedee1c0404f4dab84387a2b89b1d86c6290a9881ffa2d8ee25179a497ac
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA and includes a call-to-action to 'CLICK HERE TO ACCESS ROBLOX GENERATOR', which is a common lure for users seeking free in-game currency. The embedded URL points to a page that likely hosts a malicious payload or redirects to a phishing site. No scripts were extracted from this sample, but the PDF structure and embedded URLs suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7947

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/how-to-get-free-robux-hack-2021-game-hack
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/free-robux-promo-codes_GM431946152.pdf
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/free-cracked-minecraft-server-hosting_GM479516143.pdf
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/free-coin-master-hack-no-verification_GM406889139.pdf
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/robux-codes_GM431946152.pdf
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/how-can-you-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032ef.bin
8e0da4714d2588023d486feb56458b658be92e23565e3b57f6b460593147aa9d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32EF 25116 bytes
font_01_sfnt_off00006c79.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C79 2840 bytes
font_02_sfnt_off00007626.bin
ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7626 6700 bytes
font_03_sfnt_off00008664.bin
bf126c80224e4ece1a877f3c45a4e2f725662c205f8b78a709aa4c80730d283c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8664 19084 bytes

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