Malicious PDF — malware analysis report

Static analysis result for SHA-256 6faa0012c0eb6a00…

MALICIOUS

PDF

35.4 KB Created: 2021-06-29 08:54:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 89b2d31207a61c28a3c2217d6eeabfe1 SHA-1: b99f16cd9932b6c2596467156cb3a83318064783 SHA-256: 6faa0012c0eb6a0093c802061d87e1ca53a904e0a53a3a48b49a6420232cd4cc
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which are presented as links to hacks or free in-game currency for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the 'SE_DOWNLOAD_BUTTON' suggests a lure to click these links. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves tricking users into visiting these links, which likely host further malicious content or phishing pages.

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-robux-without-gift-cards-game-hack
    • http://sistem.amikomsolo.ac.id/perpus/repository/retail-tycoon-hack-roblox-script_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/console-developer-tools-robux-free_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/free-daily-spins-coin-master-2021_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/free-robux-rewards_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/robux-for-free-quick-and-easy_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/coin-master-free-spins-daily-2021_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/roblox-pink-free-robux_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/cheat-engine-roblox-sword-fighting-tournament_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/coin-master-gold-cards-free-2021_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/roblox-private-server-free-download_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/minecraft-hacks-for-2b2t_GM479516143.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/mistplay-hack-roblox_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/how-to-get-free-robux-fast_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/free-robux-hack-no-verification-or-survey-2021_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/guuuddinfo-hack-robux_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/roblox-phantom-forces-pepsis-aimbot-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003052.bin
f241b41400622728f58433799340eea18f16ebacb286cc80429713ff70a12e8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3052 23092 bytes
font_01_sfnt_off000063c4.bin
69f1ea22c57778ad67fdd0d4e99d64374ff04791dbc4b76be1b2e6e7d6324bcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C4 19644 bytes

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