Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9067f20e7c3b39…

MALICIOUS

PDF

49.1 KB Created: 2021-06-08 22:10:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8db8971ffb2bbd8a3f89901707c5a6a6 SHA-1: ab2039a101048c39c691043b78317b803734ea4a SHA-256: 1a9067f20e7c3b39bc78b0f9d9be32aeaa2d7bcba9737a84d31edf308025db5f
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, a common social engineering tactic to trick users into interacting with malicious content. It also contains an embedded URI pointing to a URL that likely hosts a payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/free-roblox-password-and-username-game-hack PDF link annotation
    • http://www.e-lysis.com/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://www.e-lysis.com/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.e-lysis.com/images/pokemon-go-hack-free-coins_GM1094591345.pdfIn PDF document text
    • http://www.e-lysis.com/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://www.e-lysis.com/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.e-lysis.com/images/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://www.e-lysis.com/images/in-which-country-pubg-uc-is-cheapest_GM1330123889.pdfIn PDF document text
    • http://www.e-lysis.com/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.e-lysis.com/images/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.e-lysis.com/images/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • http://www.e-lysis.com/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.e-lysis.com/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://www.e-lysis.com/images/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://www.e-lysis.com/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.e-lysis.com/images/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://www.e-lysis.com/images/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://www.e-lysis.com/images/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://www.e-lysis.com/images/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://www.e-lysis.com/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://www.e-lysis.com/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B5 25736 bytes
SHA-256: feff900c10e36999f33c83c9785a52a62f02f1b31d1ca0fdd393eb5b7671379a
font_01_sfnt_off00008e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4E 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF6 19112 bytes
SHA-256: 1e985d9a99970a78e841861fd16eeaa652dbed0cf2349cf39c8e42f234f1679f

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