Malicious PDF — malware analysis report

Static analysis result for SHA-256 276e83282fe3b533…

MALICIOUS

PDF

48.1 KB Created: 2021-05-30 23:56:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 73ba945fbdca3e2cb21803d23b396b7a SHA-1: 47898bdcc97d84dd8419976c1a83b7367edf39f9 SHA-256: 276e83282fe3b5330e8b56f43b0b3edeaee09ce707f7e8f977b69bebf33e9355
142 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are related to popular games and in-game currencies, suggesting a lure for users seeking free items. The 'SE_CLICKFIX' heuristic indicates the document may instruct users to execute commands, a common tactic to bypass security measures. The ML classifier also flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8017

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.xyz/app/479516143/minecraft-free-unblocked-game-hack
    • https://acasm.org.au/wp-content/uploads/fsqm-files/funbloxxyz-free-robux_GM431946152.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/minecraft-for-free-on-phone_GM479516143.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/coin-master-free-spins-link-download_GM406889139.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/free-college-textbooks-tiktok_GM835599320.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/free-tiktok-hearts_GM835599320.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/roblox-hack_GM431946152.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/you-promised-my-son-free-robux_GM431946152.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/free-spin-in-coin-master_GM406889139.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/claim-free-robux_GM431946152.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/free-robux-websites-2021_GM431946152.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/free-24-7-minecraft-server_GM479516143.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/minecraft-online-free-download_GM479516143.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/freer-pro-tiktok_GM835599320.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/how-to-get-free-robux-hack_GM431946152.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/free-robux-no-human-verification-2021_GM431946152.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/free-robux-no-offers_GM431946152.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/free-spin-link-for-coin-master-game_GM406889139.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/free-robux-roblox-promo-codes_GM431946152.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/free-spins-and-coins-coin-master_GM406889139.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/minecraft-free-download-android_GM479516143.pdf
    • https://acasm.org.au/wp-content/uploads/fsqm-files/minecraft-skins-free-girl_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000558f.bin
29429e79ae501ee53daed4193b4f39cd51520d557deb61eca16f978c57059364		 pdf-font-stream PDF embedded font (sfnt) at offset 0x558F 25424 bytes
font_01_sfnt_off00008e70.bin
02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E70 2912 bytes
font_02_sfnt_off0000986c.bin
4446ec9a14b3bfac30f066e0e962bc7f96b5cea98edad6ed93b9652aaf8297cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x986C 18472 bytes

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