Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0a63fa50150b79…

MALICIOUS

PDF

34.9 KB Created: 2021-07-08 12:55:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5eb79e8550f423bb914ce63c64b19d90 SHA-1: 3e5d79f51c10b83e69b88caef7f1e67a9a417ad8 SHA-256: db0a63fa50150b794178d21e25368851a6569bed9fa142aac15bd776e6a53727
102 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which are SEO-optimized and point to sites offering game hacks and free in-game currency, suggesting a lure for users to download potentially malicious software. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a link farm further supports this assessment.

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/479516143/minecraft-pe-apk-game-hack
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-to-really-hack-roblox_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/free-robux-net_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-to-get-free-robux-no-hack-2021_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-do-you-get-free-robux_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/youtube-roblox-avatar-free_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/free-robux-2021-easy-not-working_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/boku-no-roblox-remastered-quirk-hack_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-do-you-get-free-builders-club-in-roblox_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/minecraft-java-edition-free-code_GM479516143.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/robuxian-com-free-robux-code-generator-roblox-code-generator_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/free-robux-codes-no-verification_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/free-robux-no-verification-2021-ios_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/roblox-super-hacks-2021_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/free-coins-coin-master-blog_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/today-free-spin-link-for-coin-master_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-to-download-wall-hacks-on-roblox_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/free-draw-2-roblox_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-to-get-100-robux-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000340c.bin
cf149039b968108cf43185170a4e7846a172896641dbf68dc6912c0091d7f7b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x340C 22316 bytes
font_01_sfnt_off000065b9.bin
be91706a5984af6f52632c5b435120e4fc5e0e81192531de8d8fc3d36aaddc1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B9 18356 bytes

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