Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7fbfb0b114fc51…

MALICIOUS

PDF

45.8 KB Created: 2021-05-16 15:09:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0584f6b57a0a9dd8db60ab29e45be908 SHA-1: 84cbe788e3adab3f42a9bf8344c3fc0dd1ac72d4 SHA-256: ee7fbfb0b114fc517fda2f0b8193f0b95a2ecc555483b91db3c7c1279810f859
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to game-related cheats and hacks, suggesting a lure for users to download potentially unwanted or malicious software. The presence of a 'download button' heuristic further supports this malicious intent. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/coin-master-free-spin-download-game-hack
    • http://i-koinoxrista.gr/images/coin-master-free-spins-link-2021-no-verification_GM406889139.pdf
    • http://i-koinoxrista.gr/images/free-robux-website_GM431946152.pdf
    • http://i-koinoxrista.gr/images/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://i-koinoxrista.gr/images/coin-master-update-2021_GM406889139.pdf
    • http://i-koinoxrista.gr/images/roblox-gift-card-for-free_GM431946152.pdf
    • http://i-koinoxrista.gr/images/free-robux-games_GM431946152.pdf
    • http://i-koinoxrista.gr/images/minecraft-pe-hacked-client-download_GM479516143.pdf
    • http://i-koinoxrista.gr/images/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://i-koinoxrista.gr/images/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://i-koinoxrista.gr/images/coin-master-hack-without-verification-2021_GM406889139.pdf
    • http://i-koinoxrista.gr/images/free-coins-coin-master-ios_GM406889139.pdf
    • http://i-koinoxrista.gr/images/roblox-password-hacker_GM431946152.pdf
    • http://i-koinoxrista.gr/images/roblox-g_GM431946152.pdf
    • http://i-koinoxrista.gr/images/how-to-hack-coin-master-facebook_GM406889139.pdf
    • http://i-koinoxrista.gr/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • http://i-koinoxrista.gr/images/minecraft-login-free_GM479516143.pdf
    • http://i-koinoxrista.gr/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • http://i-koinoxrista.gr/images/how-to-hack-coin-master-game-2021_GM406889139.pdf
    • http://i-koinoxrista.gr/images/hack-version-of-coin-master_GM406889139.pdf
    • http://i-koinoxrista.gr/images/roblox-free-accessories_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b6e.bin
2861ff3554337a7f1d4da2b9383304faa09bd8745515df88eb6db2b9357d563a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B6E 24908 bytes
font_01_sfnt_off000083d5.bin
1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D5 3380 bytes
font_02_sfnt_off00008fbe.bin
d2049980b499644707db7dbba33f42fd49626c5cebf4a87bca5165b0820086b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBE 18464 bytes

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