Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef0f80e380480b2…

MALICIOUS

PDF

43.5 KB Created: 2021-05-12 00:01:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 60fd914c5f6bbf620c44a57b19bed0c7 SHA-1: c7eb84f4254e843f6274cc5dad2b2963ab981d4f SHA-256: 4ef0f80e380480b2d9f7214f36c87669ab96e728d6259efb0afb541688d6f0a1
142 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a social engineering lure, specifically a fake CAPTCHA and a download button, designed to trick users into downloading potentially malicious content. The presence of multiple external URLs, including one pointing to a game mod download, suggests an attempt to redirect users to a malicious site or download a payload. The document's content and heuristics strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/479516143/chisel-and-bits-mod-minecraft-pe-game-hack
    • http://knjiznica-oroslavje.hr/files/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://knjiznica-oroslavje.hr/files/coin-master-hack-without-human-verification_GM406889139.pdf
    • http://knjiznica-oroslavje.hr/files/free-spins-for-coin-master-app_GM406889139.pdf
    • https://www.knjiznica-oroslavje.hr/files/earn-robux-for-roblox_GM431946152.pdf
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-spins-promo-code_GM406889139.pdf
    • https://www.knjiznica-oroslavje.hr/files/coin-master-invite-friends-hack_GM406889139.pdf
    • http://knjiznica-oroslavje.hr/files/how-to-change-roblox-username-for-free_GM431946152.pdf
    • http://knjiznica-oroslavje.hr/files/mcpe-com_GM479516143.pdf
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdf
    • http://knjiznica-oroslavje.hr/files/how-to-get-free-roblox_GM431946152.pdf
    • http://knjiznica-oroslavje.hr/files/coin-master-hack-version-download-2021-ios_GM406889139.pdf
    • http://knjiznica-oroslavje.hr/files/minecraft-hack-mod_GM479516143.pdf
    • http://knjiznica-oroslavje.hr/files/get-free-cards-for-coin-master_GM406889139.pdf
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • https://www.knjiznica-oroslavje.hr/files/games-to-get-free-robux_GM431946152.pdf
    • http://knjiznica-oroslavje.hr/files/roblox-hack-com_GM431946152.pdf
    • http://knjiznica-oroslavje.hr/files/minecraft-hacks-for-2b2t_GM479516143.pdf
    • https://www.knjiznica-oroslavje.hr/files/daily-free-spins-coin-master-2021_GM406889139.pdf
    • https://www.knjiznica-oroslavje.hr/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdf
    • https://www.knjiznica-oroslavje.hr/files/coin-master-hack-fast-org_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e21.bin
3ca4a413f70fd63dc75d1ede6fbbb0b88558760418c1a90c6ff2e732b173f90a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E21 25272 bytes
font_01_sfnt_off0000876c.bin
61a31027f058db0827ef217670a8e1f5e2a0522dc8390d68666358c3512875fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876C 18492 bytes

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