Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c44e346a43fc049…

MALICIOUS

PDF

44.3 KB Created: 2021-06-09 07:31:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0e66d2fe0e43ad37218d79a502d762b3 SHA-1: 8f2b4cddf59adaa9ff82a34d55521458fa60c46a SHA-256: 2c44e346a43fc049b429f0f74ef8ae13dae81eb79e55e48ad53ce4419f7da88b
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to attract users searching for game-related cheats or resources. The primary external URI, 'https://netcdn.tw/app/431946152/veste-free-game-roblox-game-hack', likely serves as a lure or a landing page for a malicious download. The ML classifier strongly indicated maliciousness, supporting the interpretation of this document as a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/veste-free-game-roblox-game-hack PDF link annotation
    • http://lib.fekon.untad.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-source_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/picture-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-link-today-instagram_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_off00004ed8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ED8 25888 bytes
SHA-256: 202642c457374df7c27772116b25629b6e7bbf7412189a5da21d1407c03f7d9f
font_01_sfnt_off0000891a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x891A 18672 bytes
SHA-256: fb97ff36d2c5131e0fd05c1767d27cd37cb451caeb046968a6de3cab69bb202b

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