Malicious PDF — malware analysis report

Static analysis result for SHA-256 811bc154295b8760…

MALICIOUS

PDF

44.8 KB Created: 2021-05-14 02:36:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: aa6290df1ab2fe176c82801450727657 SHA-1: 5ea34343b44ececcee5f9e95c1223bf6d9d35c33 SHA-256: 811bc154295b876087c4a37807421d56820dccd00407039647241df036ccebd9
102 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which appear to be SEO-optimized for game-related cheats or free currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of such links, suggesting a link farm or a distribution point for malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs likely lead to further malicious content or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-spin-link-for-coin-master-game-hack
    • https://citramandiribor.com/ckfinder/userfiles/files/how-do-you-get-roebucks-for-free_GM431946152.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-spin-hack_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/minecraft-free-download-no-virus_GM479516143.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/free-robux-images_GM431946152.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/free-robux-sites-that-work_GM431946152.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-free-pin_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-free-spins-link-today-ios_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/play-minecraft-for-free-on-pc_GM479516143.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-free-spin-best-link_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/hack-coin-master-343-apk_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/clean-master-hack-coins_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/hack-coin-master-2021_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/best-free-spin-app-for-coin-master_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/robloxheroxyz-free-robux_GM431946152.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-free-spins-link-may-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b6a.bin
6637c3c57248ba9141a012ded7f2cde81e0d34a76b517461a9a199711b6a6ff1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B6A 24632 bytes
font_01_sfnt_off000083b3.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B3 2840 bytes
font_02_sfnt_off00008d65.bin
b406b504177f6b640bc1dbcd325e02770f8a0621b64b682f119f0b5c1d0e735d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D65 18056 bytes

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