Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37cc629096582eb…

MALICIOUS

PDF

46.0 KB Created: 2021-06-09 16:19:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 312d0a00038afd578d43d1baa6c995fe SHA-1: 329d8c806e43c65f3aac842336cec0510c34a758 SHA-256: d37cc629096582eba324cfad6287d853b77b73fe7fe8edf82c1d03ab16d9640e
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document body and extracted URLs indicate a lure related to hacking game accounts, specifically Roblox. The presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or credential harvesting attempt, likely leading to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/hacking-roblox-accounts-passwords-game-hack PDF link annotation
    • http://ines.co.rs/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-no-human-verification-jeuxvideocom_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-in-roblox-generator_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/minecraft-java-free_GM479516143.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_004_off0000524b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x524B 25724 bytes
SHA-256: b095ec1992368eee9ae7737a2ff5a4a2c8a7ea65605cfef36b50ee6e178a9e81
font_01_sfnt_off00008e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1D 19324 bytes
SHA-256: feedaf2c8bed800d8a21f996b8b187157c2803f33d75303ade08e6b8ecfb9b23

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