Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b9f53ced142450…

MALICIOUS

PDF

45.4 KB Created: 2021-05-13 11:33:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bfe74e474bfddf9bfc1db36f927c46c8 SHA-1: a78f781f1e142e2c6ee8d9a99ef5ddbb03c7218f SHA-256: 27b9f53ced142450629dadd248520d01b337783f8a4537b50fdb475d649ad5fe
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be SEO-optimized for terms related to game hacking and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier strongly suggests maliciousness. The document body, though partially corrupted, contains references to game-related terms and URLs, reinforcing the lure to click on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/431946152/what-are-points-for-in-roblox-game-hack
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-2021_GM431946152.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-with-root_GM406889139.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-pe_GM479516143.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/free-robux_GM431946152.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/hack-coin-master-no-survey_GM406889139.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/roblox-studio-free_GM431946152.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-iphone_GM406889139.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-android_GM406889139.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-download-latest-version_GM406889139.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-rewards-free-spins_GM406889139.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/robloxmatchcom-free-robux_GM431946152.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-daily-spin-link-app_GM406889139.pdf
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/lastrick-com-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c4d.bin
27bac964732b20c9685f4c9547556b3e5d383d468c9ecd262885c75a1c6ccb1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4D 24432 bytes
font_01_sfnt_off0000835d.bin
5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x835D 2872 bytes
font_02_sfnt_off00008d19.bin
206cb619b231d756b6c1a7d20fb1c5b26e436c335fc4475252eb18f08bbae5e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D19 18916 bytes

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