Malicious PDF — malware analysis report

Static analysis result for SHA-256 07947c8fc04435af…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 04:06:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 04101b4a2039089feac887a614079a1c SHA-1: 0c58bef3fbd6af23beffc1e495d004f129c8ca22 SHA-256: 07947c8fc04435af1c96c3527b78d7f2fb6ded2c36fb9f8503bc4e607c3a0424
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, including one that directly advertises 'free Robux without verification'. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a download button lure reinforces the phishing and potential malware distribution intent. No scripts were extracted, but the overall pattern suggests a lure for downloading a second-stage payload.

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.tw/app/431946152/free-robux-without-verification-game-hack PDF link annotation
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-hacked-place-database_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-hack-roblox-for-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/robux-hack-no-download-2021_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/hex-number-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-get-free-clothes-on-roblox-xbox-one_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-studio-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
font_00_sfnt_off00002e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E05 22156 bytes
SHA-256: bdc346f2d93f882946b5d29a1f3e8bc268a2f87f44d9db75c3d7b712611b964b
font_01_sfnt_off00005f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F40 19436 bytes
SHA-256: 45b9ce1014872b369476cc75d8a7b63b2e3ed395e28419daf66bd30eabd4401a

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