Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d3b6575d8d3d746…

MALICIOUS

PDF

34.6 KB Created: 2021-06-21 17:53:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e11645a883329b00bbf55fdf1bf6b337 SHA-1: d265e61a0ff42a5b478e940e4abdfc8231a68bc3 SHA-256: 1d3b6575d8d3d74677d0ccf2d6202befdc72ab0f153ff785d4b7e91c5f526d1a
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains embedded URLs and text that lure users into downloading game-related hacks and cheats. The ML classifier strongly indicates maliciousness, and the presence of download-related lures suggests the document is designed to trick users into executing further malicious content. The primary URL http://netcdn.co/app/406889139/coin-master-free-spins-and-coins-daily-game-hack is a key indicator of this malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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 http://netcdn.co/app/406889139/coin-master-free-spins-and-coins-daily-game-hack PDF link annotation
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_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
font_00_sfnt_off00003248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3248 22096 bytes
SHA-256: c42f28c643e39b5dd29643f17c09c98352d23f9a414f15ef7259bfcabacf08a1
font_01_sfnt_off00006335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6335 18772 bytes
SHA-256: 19a32b246d97102996ae87c3480bab741072fa74bbecf67b9c68c4bb2203f36d

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