Malicious PDF — malware analysis report

Static analysis result for SHA-256 31105721354a87a4…

MALICIOUS

PDF

32.0 KB Created: 2021-05-30 17:42:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1ffc16b174134beff7fce25f66178240 SHA-1: c279e33f08a093bfb9fc1c3f290fd8dfcefbbdea SHA-256: 31105721354a87a4c8c19ba89d72208e686af51182021d5cd3c9449e093f3c3e
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are SEO-optimized and point to websites offering free items for games like Minecraft and TikTok. This suggests a phishing or scam attempt to drive traffic to potentially malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 3

  • 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.
  • 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/835599320/free-tiktok-bots-game-hack
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-24-7-minecraft-server_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-free-spins-promo-code_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-tiktok-comments_GM835599320.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/is-minecraft-bedrock-edition-free_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-for-kids_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/robux-hack-me_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-free-spins-2021_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/minecraft-free-download_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-spins-coin-master-app_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/tiktok-minecraft-hacks_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/daily-free-spins-for-coin-master_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-exe_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/minecraft-story-mode-free_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-do-u-get-free-robux-2021_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-tiktok-followers-no-downloads_GM835599320.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/haktuts-coin-master-free-spins_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-minecraft-codes_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/minecraft-online-free-no-download_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/robux-com-free_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-hack-a-minecraft-server_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/is-minecraft-free-on-nintendo-switch_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-tiktok-video_GM835599320.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-play-minecraft-for-free_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/minecraft-name-tag-hacks_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-human-verification_GM431946152.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000539e.bin
494e043bc9e17e4f94abb9223eb14b827a39bc03e94d5e97e8894147f8ab09c7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x539E 17163 bytes

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