Malicious PDF — malware analysis report

Static analysis result for SHA-256 817332c386ab701a…

MALICIOUS

PDF

33.9 KB Created: 2021-06-26 13:23:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2d3a7a8ca4eac63c0216d242534f53f2 SHA-1: 1e3f44fc884c62c4a81f24d63f2fce7aec91db07 SHA-256: 817332c386ab701a1a848a13557f1163f4974feab115bad0af458ea415866e7d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes free in-game items for popular games, acting as a lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to malicious sites for potential malware download or credential harvesting.

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-to-get-free-face-roblox-game-hack
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/coin-master-free-spin-app-iphone_GM406889139.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/coin-master-gold-cards-hack_GM406889139.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/coin-master-hack-apk_GM406889139.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/free-tiktok-followers-zonder-verification_GM835599320.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/coin-master-free-download-for-pc_GM406889139.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/coin-master-free-spins-only_GM406889139.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/how-to-get-any-roblox-shirt-for-free_GM431946152.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/coin-master-hack-app-ios-download_GM406889139.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/roblox-group-free-robux_GM431946152.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/how-to-get-free-robux-tablet-2021_GM431946152.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/free-diamonds-coin-master_GM406889139.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/game-is-infected-roblox-hacker_GM431946152.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/how-to-get-free-clothes-on-roblox_GM431946152.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/free-robux-no-scam_GM431946152.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/roblox-army-free-robux_GM431946152.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/free-roblox-clothes-2021_GM431946152.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/coin-master-hacks_GM406889139.pdf
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/free-robux-generator-no-verification-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fae.bin
b1effc609ab1c64299463f48f1a04d562e29b0735350b57e4c11e33e9e21e3ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAE 21884 bytes
font_01_sfnt_off00005fb7.bin
de6af45d73198c7c72fc4be1abdd0a133bc2cf5f84c75cc4ef38dc4fd35a4b41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB7 18920 bytes

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