Malicious PDF — malware analysis report

Static analysis result for SHA-256 5963462c4e54b6bb…

MALICIOUS

PDF

45.7 KB Created: 2021-06-08 15:23:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e65d1e2f37344a780d9fb1ec4a2d54fa SHA-1: ad06accabb0fe90aca145a959fbb8371a2b45603 SHA-256: 5963462c4e54b6bbb64e9924a9934f5467106eda93dcb870e32ea690ba653210
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious lure, employing a fake CAPTCHA to trick users into interacting with embedded links. The document contains a large number of external links, many of which point to SEO-optimized PDF files hosted on subarulegacy.com, suggesting a link farm or content-loading strategy. The primary external URL points to a resource related to 'roblox-hide-and-seek-extreme-hacks-game-hack', indicating a potential lure for game-related cheats or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.tw/app/431946152/roblox-hide-and-seek-extreme-hacks-game-hack PDF link annotation
    • http://subarulegacy.com/images/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/cheat-engine-67-roblox-robux_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://subarulegacy.com/images/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://subarulegacy.com/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://subarulegacy.com/images/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004da6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DA6 24036 bytes
SHA-256: 4d5ff2686a238d883a89c327d6d74129cdc11653792e1eec3087cfd76c765676
font_01_sfnt_off0000845a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x845A 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0A 18840 bytes
SHA-256: c3816c3866693331b27b72e5d92bb8532d696f2f86a56f74116f1d61712240fa

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