Malicious PDF — malware analysis report

Static analysis result for SHA-256 a533f0f4c3c5fd4c…

MALICIOUS

PDF

34.4 KB Created: 2021-06-29 11:19:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a61e49c501d2e60c21db4031b62d14cf SHA-1: 57a09f06b355c0305d730a786520cc373bc470d2 SHA-256: a533f0f4c3c5fd4cb576754be35cca907c559d4e368d4291b580656dbb6908ce
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are SEO-optimized and point to pages offering "free Robux" or "hacks" for games. The ML classifier strongly flagged this PDF as malicious, and the presence of a "download button" heuristic further supports a malicious intent to trick users into clicking links that likely lead to malware downloads or scams. The document's primary purpose appears to be a lure for users seeking in-game advantages, directing them to external resources.

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/robux-free-robux-generator-game-hack
    • https://privatearrangements.co.nz/public/files/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • https://privatearrangements.co.nz/public/files/can-you-host-a-minecraft-server-for-free_GM479516143.pdf
    • https://privatearrangements.co.nz/public/files/free-robux-games-that-actually-work_GM431946152.pdf
    • https://privatearrangements.co.nz/public/files/hack-coin-master-apk-mod_GM406889139.pdf
    • https://privatearrangements.co.nz/public/files/free-hair-in-roblox-not-model_GM431946152.pdf
    • https://privatearrangements.co.nz/public/files/can-pokemon-go-free-account_GM1094591345.pdf
    • https://privatearrangements.co.nz/public/files/free-roblox-no2-copy_GM431946152.pdf
    • https://privatearrangements.co.nz/public/files/coin-master-ios-hack-download_GM406889139.pdf
    • https://privatearrangements.co.nz/public/files/roblox-all-games-hack_GM431946152.pdf
    • https://privatearrangements.co.nz/public/files/coin-master-spins_GM406889139.pdf
    • https://privatearrangements.co.nz/public/files/is-minecraft-bedrock-edition-free_GM479516143.pdf
    • https://privatearrangements.co.nz/public/files/free-roblox-script-executor_GM431946152.pdf
    • https://privatearrangements.co.nz/public/files/100-robux_GM431946152.pdf
    • https://privatearrangements.co.nz/public/files/free-robux-easy-and-fast_GM431946152.pdf
    • https://privatearrangements.co.nz/public/files/minecraft-pe-hack-client_GM479516143.pdf
    • https://privatearrangements.co.nz/public/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdf
    • https://privatearrangements.co.nz/public/files/how-to-get-any-hair-for-free-on-roblox_GM431946152.pdf
    • https://privatearrangements.co.nz/public/files/free-robux-gift-card-uk_GM431946152.pdf
    • https://privatearrangements.co.nz/public/files/hacking-coolrichytimemax-in-roblox_GM431946152.pdf
    • https://privatearrangements.co.nz/public/files/mcpe-client_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003166.bin
37b3decff5b6d5cb536c56a5a47b94f84ec682e9558bc474c58d12847c0dd8af
pdf-font-stream PDF embedded font (sfnt) at offset 0x3166 21992 bytes
font_01_sfnt_off0000622a.bin
a912e1d08f949f209c700bff1dccab436b6085e2bf141dd01d5385383654b949
pdf-font-stream PDF embedded font (sfnt) at offset 0x622A 18820 bytes