Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf26d11b7685b83…

MALICIOUS

PDF

43.5 KB Created: 2021-05-15 13:04:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 56800e2cf0ff2e7179a88ace396223bd SHA-1: 52bd4ed1510c6a7469ad84f6b3c9485cf727debe SHA-256: dbf26d11b7685b83b05f13bee893de574b4db772eab4efc4d373281f3dfa244e
82 Risk Score

Malware Insights

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

The document's content and heuristics indicate a malicious intent, specifically employing a fake CAPTCHA lure to deceive users. The presence of numerous embedded URLs, including a prominent one pointing to a suspicious domain, suggests an attempt to redirect users to malicious content or downloads. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/pop-slots-free-vegas-casino-slots-machine-game-coin-master-game-hack PDF link annotation
    • http://classicskitours.net/images/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://classicskitours.net/images/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://classicskitours.net/images/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://classicskitours.net/images/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://classicskitours.net/images/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://classicskitours.net/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://classicskitours.net/images/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://classicskitours.net/images/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://classicskitours.net/images/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://classicskitours.net/images/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://classicskitours.net/images/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://classicskitours.net/images/wurst-commands_GM479516143.pdfIn PDF document text
    • http://classicskitours.net/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://classicskitours.net/images/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://classicskitours.net/images/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://classicskitours.net/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://classicskitours.net/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://classicskitours.net/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://classicskitours.net/images/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://classicskitours.net/images/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48EF 26824 bytes
SHA-256: c1477f09e7b18a3efd39ec054f07a5bb1191d9b582d4d4f3d091701ba361dd19
font_01_sfnt_off00008603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8603 18960 bytes
SHA-256: 1c2867144f4dcbe006f7dd1ea5adad3b4b3257689db3166d94319e477c45a36b

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