Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db31d46551c1929…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 06:31:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a3745ce0675ee8c4c5c0c2c04d91d106 SHA-1: 1d7d60cf294f7ae2ac0b675e8c461cc14f385f97 SHA-256: 0db31d46551c19297bb459e9494ced48b750745916af374c461d5a3a3cab8a9a
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 document body referencing 'Roblox Hack Generator', indicating a lure for users to download potentially malicious files. The PDF_SEO_LINK_FARM heuristic confirms a large number of external links, suggesting a link farm designed to drive traffic to exploit or malware sites. The ML classifier also strongly flagged this PDF as malicious.

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.tw/app/431946152/roblox-hack-generator-game-hack
    • https://www.vizyonproduction.com/application/uploads/assets/files/roblox-hack-unlimited-robux_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/how-to-get-a-face-for-free-in-roblox_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-free-spin-and-trading-group_GM406889139.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/free-roblox-account-with-pin_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/how-to-get-a-lot-of-robux_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/roblox-dungeon-quest-level-hack_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/rbxoffers-com-free-robux_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/free-coin-spin-daily-link-coin-master_GM406889139.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/roblox-decal-for-free_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/lazyblocks-com-robux_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/daily-coin-master-free-spin-link_GM406889139.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/real-free-robux-generator_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/get-free-robux_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/rbx-land-free-robux_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/how-to-get-free-roblox_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/minecraft-education-edition-free-download_GM479516143.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/minecraft-dungeons-free-download_GM479516143.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/how-to-get-free-minecraft-alts_GM479516143.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/how-can-i-get-minecraft-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ed3.bin
1fa1cd3bbebd676acc8586812885574091904b19dc9311b3d6d53bcede931e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED3 22872 bytes
font_01_sfnt_off0000626e.bin
b79899937f6f59d67c0cc016ae9e295c0b2eeda93cfd6b0750b290eebb9c7341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626E 18760 bytes

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