Malicious PDF — malware analysis report

Static analysis result for SHA-256 069ebc823d7ac56f…

MALICIOUS

PDF

43.2 KB Created: 2021-05-20 00:31:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c2b213a203b664b0edb9ff060a9ac91d SHA-1: 2d779564292dc1644c3a80c7af9427be4fbe0032 SHA-256: 069ebc823d7ac56f4801c50363505e04d2265b4a01a269784ea9747bae576f46
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links to external websites, many of which are structured as SEO-optimized links to other PDF files. These links, along with the document body mentioning "promo codes" and "hacks," suggest a lure to download potentially malicious content. The ML classifier strongly indicated maliciousness, and the presence of a large number of external links points to a link farm or distribution mechanism for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/roblox-promo-codes-free-robux-game-hack
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/get-2021-free-spins-on-coin-master_GM406889139.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/funbloxxyz-free-robux_GM431946152.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/minecraft-gun-mod-download-free_GM479516143.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/coin-master-32-mod-hack-unlimited_GM406889139.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/free-minecraft-games-for-kids_GM479516143.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/robloxmatchcom-free-robux_GM431946152.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/free-robux-no-verification-no-download_GM431946152.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/free-robux-without-verification-2021_GM431946152.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/free-card-link-coin-master_GM406889139.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/classic-minecraft-net-hacks_GM479516143.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/get-free-robux-info_GM431946152.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/village-coin_GM406889139.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/free-robux-by-watching-ads_GM431946152.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/legit-coin-master-hack-without-verification_GM406889139.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/coin-master-spin-free_GM406889139.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • https://kakipalsupekanbaru.com/ckfinder/userfiles/files/minecraft-pe-hacks-2021_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bd4.bin
b113484c6a041150a6a6ace77b876ad4c4ae6b5055d7cbe7ffcefcbfc21f3162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD4 25220 bytes
font_01_sfnt_off000085a8.bin
3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A8 18676 bytes

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