Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceea24eaeef89dc4…

MALICIOUS

PDF

37.2 KB Created: 2021-07-06 09:26:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 49be1318a488bbe31b2dff686bfeb156 SHA-1: 1056c46ae2f475173c6fb79dd2a8b8bd56697020 SHA-256: ceea24eaeef89dc491dbf7f98a94a8a3484aa36d3f94c77683a4c0be15d272d3
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links to external websites, many of which are SEO-optimized to appear as legitimate sources for game cheats and hacks. The presence of a 'download button' lure and instructions for password-protected archives suggests a malicious workflow designed to trick users into downloading malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/406889139/coin-master-spin-free-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-cheat-engine-god-mode-script_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000322b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322B 22892 bytes
SHA-256: cb207ef7d5ecd49dba402ee333f3bbb3a9a2b1234214a55d7a4a79f3710d8c35
font_01_sfnt_off00006523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6523 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00006ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED4 18176 bytes
SHA-256: 9d64f59deaede30a08c34bcec3da02112a68e9d41babb799f745357d62befbf6

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