Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fb68fff05a1bc6…

MALICIOUS

PDF

51.6 KB Created: 2021-06-13 17:40:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c69eb9e66784df743bba49461839441e SHA-1: 1b163c3e069e49925c9e86c2a4c8b815b9dc85b9 SHA-256: 05fb68fff05a1bc6556f2e6698fd9ab4c4fdf1a0f42be5fd747c88cac224abbd
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, directing users to external sites. The document body text, though partially corrupted, suggests a lure related to hacking or obtaining free items for games like Roblox and Coin Master. The presence of a 'download button' heuristic further supports the malicious intent of driving users to click these links, which likely host malicious content or phishing pages. No scripts were extracted, but the overall structure and heuristics point to a malicious document designed for user-driven compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

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/comment-savoir-si-quelqu
    • http://rivne.media/ckfinder/userfiles/files/coin-master-32-hack-apk_GM406889139.pdf
    • http://rivne.media/ckfinder/userfiles/files/minecraft-com-free_GM479516143.pdf
    • http://rivne.media/ckfinder/userfiles/files/how-to-get-free-robux-on-ipad_GM431946152.pdf
    • http://rivne.media/ckfinder/userfiles/files/free-robux-that-actually-works_GM431946152.pdf
    • http://rivne.media/ckfinder/userfiles/files/free-minecraft-skins-ps4_GM479516143.pdf
    • http://rivne.media/ckfinder/userfiles/files/codes-to-get-free-robux_GM431946152.pdf
    • http://rivne.media/ckfinder/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdf
    • http://rivne.media/ckfinder/userfiles/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdf
    • http://rivne.media/ckfinder/userfiles/files/apps-for-free-spins-on-coin-master_GM406889139.pdf
    • http://rivne.media/ckfinder/userfiles/files/how-to-get-free-robux-on-phone-ios_GM431946152.pdf
    • http://rivne.media/ckfinder/userfiles/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdf
    • http://rivne.media/ckfinder/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdf
    • http://rivne.media/ckfinder/userfiles/files/roblox-free-hair-girl_GM431946152.pdf
    • http://rivne.media/ckfinder/userfiles/files/robux-free-robux_GM431946152.pdf
    • http://rivne.media/ckfinder/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdf
    • http://rivne.media/ckfinder/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://rivne.media/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://rivne.media/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • http://rivne.media/ckfinder/userfiles/files/easy-how-to-get-free-robux_GM431946152.pdf
    • http://rivne.media/ckfinder/userfiles/files/roblox-bear-hacks_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056f6.bin
23cac7f07ba82864d3af12f5feab7be16bccb0d10e8ff64f54585adc51dda949		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F6 27136 bytes
font_01_sfnt_off00009630.bin
40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9630 3884 bytes
font_02_sfnt_off0000a2d8.bin
bce3510f3249e5b1d12b6489e3be735f95dad7303f23e8db183a62d6d8ba2d1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D8 19624 bytes

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