Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ee66948229fa89…

MALICIOUS

PDF

45.5 KB Created: 2021-05-13 01:30:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4aa266fb1979ad2d25a3c3c1bc8ed327 SHA-1: a588656f6e80f2a33922831c36bb66b8c4ddac61 SHA-256: b6ee66948229fa8975b2c0f4cf4e666a722c0cc11ddfcc9d767bfb75c5dcf9ca
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a link farm, directing users to websites offering free in-game currency generators and hacks. The document body and extracted URLs strongly suggest a lure for phishing or scamming users. While no scripts were explicitly extracted, the PDF structure and the presence of external links indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/406889139/free-spins-coin-master-generator-game-hack
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/how-to-get-20210-robux-for-free_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/free-spins-october-28-2021-coin-master_GM406889139.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/how-to-make-robux-on-roblox_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/links-to-free-spins-on-coin-master_GM406889139.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/coin-master-gold-cards-free_GM406889139.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/free-robux-android_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/coin-master-hack-version-download_GM406889139.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/minecraft-hacker-skin_GM479516143.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/minecraft-for-chromebook-free_GM479516143.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/free-robux-net_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/simplysarc_GM479516143.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/www-rubux_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/codes-to-get-free-robux_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/roblox-redeem-card-codes-free_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/free-roblox-toy-codes-not-used_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/free-robux-com-no-verification_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/robux-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c9b.bin
5a572387cb785f1c6dbe2ddde8ef4cf230ad0b922f6d03457dd2413c09b10d7e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C9B 25764 bytes
font_01_sfnt_off00008717.bin
96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8717 2820 bytes
font_02_sfnt_off000090b8.bin
4dbd7a0cfee3c9b81196055844221830545f0b5886b4093cfa91146119426c66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B8 17884 bytes

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