Malicious PDF — malware analysis report

Static analysis result for SHA-256 4334707033707f2f…

MALICIOUS

PDF

48.7 KB Created: 2021-06-03 11:43:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dcc2204a7faf0004326152869e9a67da SHA-1: 537c66571185766c37736a041281af1bdb30a846 SHA-256: 4334707033707f2f38796f88ec30ccae9ebd3e55d3b971312ed5ffb640d5aa16
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are presented as SEO-optimized links to PDFs related to game hacks and free items. The primary URL, https://netcdn.online/app/406889139/game-hack-coin-master-game-hack, suggests a lure for downloading potentially unwanted or malicious software. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/game-hack-coin-master-game-hack
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-hack-2021_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/coin-master-apk-free-download_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/minecraft-windows-10-free-with-java_GM479516143.pdf
    • https://lib.unitri.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/free-minecraft-skin-maker_GM479516143.pdf
    • https://lib.unitri.ac.id/repository/play-coin-master-for-free_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/how-to-get-free-minecraft-skins_GM479516143.pdf
    • https://lib.unitri.ac.id/repository/static-moonactive_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/minecraft-games-online-free-no-download_GM479516143.pdf
    • https://lib.unitri.ac.id/repository/daily-free-spins-coin-master-heaven_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/coin-master-spin-ml-link_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/best-free-robux-sites_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/coin-master-rewards-app_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/free-robux-by-watching-ads_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/coin-master-app-for-free-spins_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/fan-page-coin-master_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/how-to-hack-minecraft_GM479516143.pdf
    • https://lib.unitri.ac.id/repository/coin-master-reward-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f8a.bin
4db14dc4785652f4b09d4e50d3b463286844c3dea44d4ad4ee83b3c0c70eb080		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8A 28656 bytes
font_01_sfnt_off0000915c.bin
7f0b48eec8e6fd5b18d168c9ddbcaf2fa2459a2caa093712ac32cf07a4771a7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x915C 3460 bytes
font_02_sfnt_off00009cc8.bin
6c4bc6518c449e74acc10e239ebc2a40e5371f7bb57007301009253b23203593		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC8 17976 bytes

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