Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f7892dc85c7ae7…

MALICIOUS

PDF

35.9 KB Created: 2021-06-20 02:19:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3d1f721043926828e9ced469aa7b286d SHA-1: ab32ad5005dddcc1a51c2fd1c00092ffd2631861 SHA-256: 50f7892dc85c7ae7468c5453771ecba6f3c511aea4b20bb06f80d691fc7a6e1c
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a call-to-action phrase, strongly suggesting a phishing or malware distribution attempt. The document body and extracted URLs indicate a lure focused on game hacks and in-game currency, aiming to trick users into downloading unwanted software. The presence of a link farm heuristic further supports the 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/roblox-got-talent-piano-hack-download-game-hack
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-robux-that-actually-works-2021_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/coin-master-instagram-free-spins_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/coin-master-hack-to-get-free-spins_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/minecraft-java-edition-free-download_GM479516143.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/coin-master-free-coins-link-2021-today_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/how-to-hack-roblox-mobile-ios_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-coin-master-game_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-robux-without-human-verification_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/how-to-get-any-gamepass-for-free-on-roblox-2021_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/get-tiktok-followers-free_GM835599320.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-robux-legally-no-offers_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/do-robux-generators-work_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/coin-master-free-cards_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/minecraft-multiplayer-free_GM479516143.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/roblox-hacks-2021_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/easy-robux-today_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-robux-and-builders-club-no-human-verification_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/coin-master-free-spins-link-today-hack_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-minecraft-skins-pc_GM479516143.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/gameoffice-net-hack-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003293.bin
b3359bb6520fb781b557851e33ffa8bcbe6b5d942dc27cb4e670ebc6e7b2fd6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3293 22840 bytes
font_01_sfnt_off000065e6.bin
537877c432c5cf6c733bdd48a720e4385103c9ca2829265f4592ea6dc01ff4f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E6 19540 bytes

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