Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f893a7c1a75ab71…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 06:08:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c29afd8526cda3cfdd85cb904a47aaa2 SHA-1: b3f066fd0821c489c43a7fbf1c0c5c6f873ef972 SHA-256: 9f893a7c1a75ab71752cdc2ae8befa41416ba9d7103d15287c8d5f53d7e640df
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure impersonating Paypal, directing users to click a link that does not match the impersonated brand. This link, https://netcdn.tw/app/431946152/free-gtv-in-roblox-game-hack, leads to a malicious website, as indicated by the ML classifier and the presence of multiple related URLs. The document's content and structure suggest an attempt to trick users into visiting a compromised or malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/free-gtv-in-roblox-game-hack.
  • 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/free-gtv-in-roblox-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/pubg-uc-malaysia-murah_GM1330123889.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robux-now_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-game_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-do-you-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/a-hack-to-get-the-bage-admin-on-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/moonactive-free-spins_GM406889139.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_off000052ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52BA 24672 bytes
SHA-256: 08975e7f278aa91c0999d00ddb1b7eef0d77c7d04a765b687fc976dc0cee7c55
font_01_sfnt_off00008b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7B 19652 bytes
SHA-256: ab52161f0b9c1668eca1dabe8eba0dd394a364645efda4745175c529ae8f6177

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