Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a389511159313d…

MALICIOUS

PDF

34.6 KB Created: 2021-07-08 12:30:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1ecfb3090b338e77d032b968e57ec0a1 SHA-1: a76fc9831c9ba34db9da97be76011e5e209381c9 SHA-256: 79a389511159313d22337b1bef6b2b215c5bd5125309b6da70a530b39045682f
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that explicitly advertises 'hacks' and 'cheats' for popular games. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm designed to attract users searching for game exploits. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is intended to lead users 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.tw/app/431946152/roblox-hacks-2021-game-hack
    • https://elearning.min11blitar.sch.id/__statics/gudangsoal/files/cheat-engain-mac-for-roblox_GM431946152.pdf
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/2021-free-coin-master-spins_GM406889139.pdf
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/coin-master-free-attack-hack_GM406889139.pdf
    • https://elearning.min11blitar.sch.id/__statics/gudangsoal/files/free-script-executor-lvl-7-roblox-18_GM431946152.pdf
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/how-to-hack-into-your-friends-roblox-account-with-robloxsecurity_GM431946152.pdf
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/minecraft-handbook_GM479516143.pdf
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/coin-master-attack-madness-hack_GM406889139.pdf
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/roblox-arsenal-hack_GM431946152.pdf
    • https://elearning.min11blitar.sch.id/__statics/gudangsoal/files/roblox-lumber-tycoon-2-cheater-box_GM431946152.pdf
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/free-multiplayer-minecraft-server_GM479516143.pdf
    • https://elearning.min11blitar.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-2021_GM431946152.pdf
    • https://elearning.min11blitar.sch.id/__statics/gudangsoal/files/is-there-a-real-way-to-get-free-robux_GM431946152.pdf
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-download_GM406889139.pdf
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master_GM406889139.pdf
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/roblox-free-draw-2-hack_GM431946152.pdf
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/free-pet-food-on-coin-master_GM406889139.pdf
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/minecraft-free-install_GM479516143.pdf
    • https://elearning.min11blitar.sch.id/__statics/gudangsoal/files/free-tix-and-robux-no-download_GM431946152.pdf
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/coin-master-hacks-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003243.bin
6d1ea74a08bf3421aea1ab09e41904d582fdd6dd14de2b90bb49f9c52026627f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3243 21744 bytes
font_01_sfnt_off00006200.bin
a827687bde1c23907f75db23928d8c544c1849638492c2c48bf6e5fa6ea38882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6200 19056 bytes

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