Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b6b65f3b1988ac…

MALICIOUS

PDF

41.3 KB Created: 2021-05-18 01:23:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bccd2e0e87e70cc7e9fd6e923df2dc3e SHA-1: ac28dc814a3126951d526ff4d9a5b94e3de2d22c SHA-256: f3b6b65f3b1988acc2b8cb74162ac60d53d15f5228ad42d2bf18c7902d9d0d4e
162 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and explicitly requests recovery secrets, indicating a phishing or credential harvesting attempt. It also contains an external URI pointing to a suspicious application download, suggesting a downloader or trojan delivery mechanism. The presence of multiple embedded URLs further supports a malicious intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.xyz/app/406889139/hack-coin-master-app-ios-game-hack PDF link annotation
    • http://www.copoint.co.uk/images/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/krnl-download_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-coin_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/lazy-blocks-com-free-robux_GM431946152.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_off0000477c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x477C 24760 bytes
SHA-256: 8f23fbd1cb8f5c9af47dca413e8985d57913056e5a7583d1215513af5bb1f91c
font_01_sfnt_off00008025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8025 17892 bytes
SHA-256: db4cb0e5038e40aae5db0274b23e1c53a74243cd1ac5b16be32cf562ede0c44a

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