Malicious PDF — malware analysis report

Static analysis result for SHA-256 88cf594cc08feb63…

MALICIOUS

PDF

35.4 KB Created: 2021-06-28 16:36:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 43ff3d1f2e58fe1d70e85451670b21b8 SHA-1: 654ce18ca1e84c427f010dea4ad7cc52a626cb35 SHA-256: 88cf594cc08feb631455fbeaa24d7b16d7cb3aac53d0109d823fc2e04109133e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to sites offering free game currency or hacks. The ML classifier and the PDF link farm heuristic indicate a high likelihood of malicious intent, likely to direct users to phishing or malware download sites. The document body and embedded URLs suggest a lure related to popular games like Roblox and Coin Master.

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/how-to-get-a-free-2021-2021-roblox-account-game-hack
    • http://www.arichuna.com/images/files/free-robux-gift-card-generator_GM431946152.pdf
    • http://www.arichuna.com/images/files/how-to-get-minecraft-pe-for-free_GM479516143.pdf
    • http://www.arichuna.com/images/files/daily-coin-master-free-link_GM406889139.pdf
    • http://www.arichuna.com/images/files/coin-master-free-spins-today-new_GM406889139.pdf
    • http://www.arichuna.com/images/files/free-robux-hacks-no-verification_GM431946152.pdf
    • http://www.arichuna.com/images/files/cheats-to-roblox-to-get-free-robux_GM431946152.pdf
    • http://www.arichuna.com/images/files/free-money-in-mad-city-in-roblox-with-codes_GM431946152.pdf
    • http://www.arichuna.com/images/files/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • http://www.arichuna.com/images/files/comment-avoir-le-double-sabre-laser-jedi-temple-roblox-free_GM431946152.pdf
    • http://www.arichuna.com/images/files/play-games-for-free-robux_GM431946152.pdf
    • http://www.arichuna.com/images/files/coin-master-rewards-2021_GM406889139.pdf
    • http://www.arichuna.com/images/files/minecraft-clipart-free_GM479516143.pdf
    • http://www.arichuna.com/images/files/promo-codes-for-free-robux_GM431946152.pdf
    • http://www.arichuna.com/images/files/open-coin-master_GM406889139.pdf
    • http://www.arichuna.com/images/files/rbx-land-free-robux_GM431946152.pdf
    • http://www.arichuna.com/images/files/get-free-followers-on-roblox_GM431946152.pdf
    • http://www.arichuna.com/images/files/free-robux-with-no-verification_GM431946152.pdf
    • http://www.arichuna.com/images/files/free-codes-for-roblox-live-now_GM431946152.pdf
    • http://www.arichuna.com/images/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdf
    • http://www.arichuna.com/images/files/roblox-can-you-upload-shirts-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003034.bin
08cdc2b300472e05849a2054c3f0b1e49a03d9ee70494d19b13bb70a9cd7a9b9
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3034 23528 bytes
font_01_sfnt_off000063d8.bin
6c53d7b154719335a6186fc9a7c4b410c1579227642b56b9a721ba82c3ff0da3
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D8 19460 bytes