Malicious PDF — malware analysis report

Static analysis result for SHA-256 e228adb53f9cef80…

MALICIOUS

PDF

34.7 KB Created: 2021-06-29 16:30:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3db9bc89f6e588fb6f3b90e5109df33b SHA-1: 3be9c8b98e3b679c5a54e030ff8c0d2e28fe26fe SHA-256: e228adb53f9cef804a23d33870df809b25e1bce5b683dc2765aa5807041772ba
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on domains related to game hacks and free in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a tactic to attract users through search engine optimization for malicious or scam-related content. The ML classifier also strongly flagged this PDF as malicious, reinforcing the assessment of a malicious intent.

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-hacks-in-roblox-game-hack
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-stuff_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-stuff-links_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-in-nba-phenom-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/earn-robux-now_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/instalar-hacks-de-comandos-de-admin-para-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-cards-pin-number_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-download-for-iphone_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-mining-simulator-cheats-mogelpower_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-ohne-handynummer-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-coins-in-mcpe-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/robux-hack-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-hack-no-download-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-in-roblox-to-rank-up-a-group_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-coins-spins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-wall-hacks-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-too-hack-in-murder-mystery-2-roblox-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-jailbreak-free-car-scripts_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030b5.bin
1f29394f86e356fddc2262ef0c170769d933cad3ed950141ad155634f90b88b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30B5 22380 bytes
font_01_sfnt_off00006293.bin
b721e41745c94a1aece5d27c6ddbc207554cd63bbce259b81b2a575d706fd649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6293 18924 bytes

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