Malicious PDF — malware analysis report

Static analysis result for SHA-256 e210380623edefdd…

MALICIOUS

PDF

50.7 KB Created: 2021-06-03 09:09:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 11e4666ac10f100133150ce3f41017dd SHA-1: 1b38a4efb0cf4776975d81d5c66b8e68df642d7f SHA-256: e210380623edefddab2d6f520450e13e8c89943df49f7d270e2c1adc61c33d63
102 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing or scam lure, presenting a fake CAPTCHA to trick users into clicking malicious links. The embedded URLs, such as 'https://netcdn.online/app/406889139/haktuts-coin-master-free-spin-link-game-hack', likely lead to further stages of the attack, such as downloading malware or redirecting to credential harvesting pages. The document body and heuristics strongly suggest a social engineering tactic to bypass user caution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

Heuristics 5

  • 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
  • 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.online/app/406889139/haktuts-coin-master-free-spin-link-game-hack PDF link annotation
    • http://windhorsetrek.com/userfiles/files/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/can-you-get-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000519c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x519C 25260 bytes
SHA-256: c3016eb7b3e4513dbf5b3201bb7ce6b9e93286690823f9a755bb8b3a5b6c96ea
font_01_sfnt_off00008be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE6 4092 bytes
SHA-256: c42ddc52594bb1b1147f846c126bf170ce8763f7029b88f31e537a748176ead9
font_02_sfnt_off000099c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99C2 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off0000a3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B2 18196 bytes
SHA-256: d21f7c9777ff22c572caba6bc61bff535e054503ba9d308437b2513133ac2854

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