Malicious PDF — malware analysis report

Static analysis result for SHA-256 65711aa0b4717375…

MALICIOUS

PDF

44.2 KB Created: 2021-06-10 23:12:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e2e67c411bb82c454ca2f399ed6e55e1 SHA-1: caa0b757ce2c14226245f50db63ae5d8de49af85 SHA-256: 65711aa0b4717375f1e417778f1974db14837296ea25774b10898176a42848c7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a website offering a 'free online Roblox code generator', which is a common lure for scams. The document also contains a large number of embedded links, many of which point to similar game-related topics, suggesting a link farm designed to attract traffic. The ML classifier also flagged this PDF as malicious with high confidence.

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/free-online-roblox-code-generator-game-hack PDF link annotation
    • http://perpus.unpam.ac.id/repository/how-to-hack-roblox-with-inspect-element-no-blogspot_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-do-you-get-free-rs-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/get-admin-in-any-roblox-game-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.communes.comIn 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_off00004f09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F09 25204 bytes
SHA-256: 92b26d7f12a08b3876ce97713d74903ed099709dca6b2a84fa642eb1bb48715e
font_01_sfnt_off00008907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8907 18572 bytes
SHA-256: 649576178b8ae6840764dbcbb730830fb09e27189c60c336e9f04f97ab6acd8b

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