Malicious PDF — malware analysis report

Static analysis result for SHA-256 d883ffe466852af7…

MALICIOUS

PDF

46.2 KB Created: 2021-05-17 13:39:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c59549935d8f7308e5fe994213d0dff9 SHA-1: f9230777c20bf64dd22810c2ab7dbcb22cdf4d72 SHA-256: d883ffe466852af7abbf7fec985c5b782f40a5e356feeb61828ed8a0baf35744
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs and a document body that explicitly promises free in-game currency for popular games, acting as a lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users searching for cheats or hacks. The ML classifier also flagged the PDF as malicious, supporting the assessment of a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/431946152/how-to-get-free-roblox-money-game-hack
    • https://www.ncscolour.no/images/how-can-i-get-free-robux_GM431946152.pdf
    • https://www.ncscolour.no/images/free-roblox-shirt-templates_GM431946152.pdf
    • https://www.ncscolour.no/images/can-you-actually-get-free-robux_GM431946152.pdf
    • https://www.ncscolour.no/images/coin-master-invite-friends-hack_GM406889139.pdf
    • https://www.ncscolour.no/images/blogspot-free-spins-coin-master_GM406889139.pdf
    • https://www.ncscolour.no/images/robux-for-kids_GM431946152.pdf
    • https://www.ncscolour.no/images/free-robux-no-human-verification_GM431946152.pdf
    • https://www.ncscolour.no/images/coin-master-free-spin-codes_GM406889139.pdf
    • https://www.ncscolour.no/images/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdf
    • https://www.ncscolour.no/images/how-to-hack-someone-on-roblox_GM431946152.pdf
    • https://www.ncscolour.no/images/coin-master-hack-version-download-2021_GM406889139.pdf
    • https://www.ncscolour.no/images/blogspot-coin-master_GM406889139.pdf
    • https://www.ncscolour.no/images/minecraft-free-minecoins_GM479516143.pdf
    • https://www.ncscolour.no/images/robux-generator-no-human-verification_GM431946152.pdf
    • https://www.ncscolour.no/images/coin-master-stop-attack-hack_GM406889139.pdf
    • https://www.ncscolour.no/images/get-me-robux_GM431946152.pdf
    • https://www.ncscolour.no/images/how-to-setup-a-minecraft-server-for-free_GM479516143.pdf
    • https://www.ncscolour.no/images/who-to-get-free-robux_GM431946152.pdf
    • https://www.ncscolour.no/images/www-coinmaster-com_GM406889139.pdf
    • https://www.ncscolour.no/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048c5.bin
b2d97fc1d260083d65c262967aa9bf83e9702a17bc94c39bd7372111586f90c2
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C5 24812 bytes
font_01_sfnt_off000080fa.bin
ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27
pdf-font-stream PDF embedded font (sfnt) at offset 0x80FA 6700 bytes
font_02_sfnt_off00009138.bin
b73f1f0d33754a6311a400e0f9b7fa1bed8423beec91854f27c9eb8add8b4fcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9138 18592 bytes