Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccb5aa74ffbebb6…

MALICIOUS

PDF

35.6 KB Created: 2021-06-30 11:21:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b703dbceed7a485908399944bc8c9545 SHA-1: 0cc242c8a784d04e43a014d8ad6f8ec4e5f1d935 SHA-256: 5ccb5aa74ffbebb641768eb8c49850960b9ccfaec9bddc27c41cbe0723f6fa4a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains numerous links to external websites, many of which are related to obtaining free in-game currency or hacks for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to direct users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-do-i-get-free-robux-on-phone-game-hack PDF link annotation
    • http://opac.ekonomi.up45.ac.id/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-hack-roblox-acount-websires_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-free-necklace_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-get-free-robux-in-iphone-6_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-get-free-vip-in-roblox-fe2_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-esp-cheat-table_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/800-free-robux-gamekit_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-no-more_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-have-free-robux-2021-and-exemple_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-roblox-accounts-with-robux-that-work-bugmenot_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/tiktok-free-real-fans_GM835599320.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_off0000318b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318B 23004 bytes
SHA-256: d5ea5cab092bdc925ead3394204d5335b1788e3f9eb369c28b97e75170999f1c
font_01_sfnt_off00006539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6539 19472 bytes
SHA-256: 6c9a9c8abcd2c4586598298558ae0d51ceee3299c3cc3d3cfc4c64f8a6b9ebbf

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