Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b59f53bd0d5bc8a…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 03:02:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 08d4d1dc01e99a1b42d6985042a82bc0 SHA-1: f7b2155f7a2f6e9308c2db12e2f85cd418fb76c1 SHA-256: 1b59f53bd0d5bc8afdc3fa737bb0aecea7acf622d04d07d05ad7c85be0288139
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which are related to game cheats and hacks, suggesting a lure for users to download potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The document's primary purpose appears to be directing users to external sites that may host malware or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/hacks-for-mad-city-roblox-immortality-game-hack
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/how-to-hack-roblox-robux-cheat-engine_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/minecraft-xbox-one-code-free_GM479516143.pdf
    • http://www.himalassociation.org/himal/ck_image/files/legitimate-coin-master-free-spins-apk_GM406889139.pdf
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-robux-easy_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/hack-xp-net-coin-master_GM406889139.pdf
    • http://www.himalassociation.org/himal/ck_image/files/try-coin-master-hack_GM406889139.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-card-codes-february-18-2021_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://www.himalassociation.org/himal/ck_image/files/roblox-hackers-list_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-no-human-verification_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/roblox-free-robux-hack-no-verify-download_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-minecraft-account-generator_GM479516143.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-games_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdf
    • http://www.himalassociation.org/himal/ck_image/files/www-free-robux_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://www.himalassociation.org/himal/ck_image/files/blox-land-free-robux_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-promo-codes-for-roblox-robux_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003080.bin
fb08ed558f412a8048542e364abd02500bda1aed4178585aaa5abc6bb0ea289e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3080 21496 bytes
font_01_sfnt_off00005f65.bin
dbe539f37c79f28ff5a43f99b9f6b2138fa1db890d753746002e4726edb9f2de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F65 19852 bytes

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