Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e1baf25fd44930…

MALICIOUS

PDF

35.6 KB Created: 2021-06-25 01:27:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c8527cd356ca1913c456d8d8b9462730 SHA-1: b6446362c193d4cf45342088bd0d1172815b6ab6 SHA-256: 58e1baf25fd44930c53fa2ed05346b3f1570deaed617a448d0f3ad41b91d412a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are SEO-optimized and point to sites offering game-related cheats or currency. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs suggests a link farm or redirection scheme. While no scripts were explicitly extracted, the document body contains embedded URLs that are likely intended to lead the user to malicious content or downloads.

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/free-roblox-redeem-codes-11-2-16-game-hack
    • http://digilib.stie-yppi.ac.id/repository/free-coin-master-spins-for-today_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-no-ban_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/buy-all-free-items-roblox-javascript_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/tiktok-free-view-kong_GM835599320.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/is-roblox-free-on-pc_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-expert-sripters-roblox_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/coin-master-game-hunter_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/roblox-the-quarry-hack_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-cards_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/no-robux_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/roblox-how-to-get-free-clothes-on-phone_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/como-hackear-roblox-facil_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/minecraft-hack-2021_GM479516143.pdf
    • http://digilib.stie-yppi.ac.id/repository/roblox-project-lazarus-zombies-hack-script_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003246.bin
49fa18e0a3a566ece41619368be9210b229800c1c3bbeff96b865da790114f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3246 22592 bytes
font_01_sfnt_off000064ca.bin
0dd1848555c98e768b1ce44695bed646bda044c51de9ad7609b3de372f915b16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CA 19480 bytes

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