Malicious PDF — malware analysis report

Static analysis result for SHA-256 831f903565888602…

MALICIOUS

PDF

33.8 KB Created: 2021-06-20 13:22:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7ec4fe8f1ef632bbd8d3b28d85b807d7 SHA-1: 2d35140cf21e08817992f6ee62dbceb12ab9918c SHA-256: 831f9035658886028456e9f6dfad7de6ca8f22c3e0353037a4d62b6ba692c2a8
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are part of a link farm designed to direct users to sites offering free in-game currency or hacks for popular games. The ML classifier strongly indicated maliciousness, and the presence of a "download button" heuristic further supports the lure of downloading unwanted content. The document's primary purpose appears to be to trick users into visiting these external links, likely leading to malware downloads or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/free-roblox-accounts-with-robux-and-bc-game-hack
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-frebruary-2021_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/free-minecraft-printables_GM479516143.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-hack-spins-android_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-play-minecraft-for-free_GM479516143.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana//repository/play-minecraft-pocket-edition-for-free_GM479516143.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/hackear-coin-master-sin-verificacion_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana//repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-download-free-hack_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-generator-2021-no-survey_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-get-free-robux-fast_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-free-spin-software_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/cheat-codes-for-coin-master_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/blox-supply-free-robux_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-rocitizens-free-money-codes_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-gift-card-generator_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-robux-no-verification-or-download_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/can-you-get-roblox-on-xbox-one-for-free_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-free-robux-pin-code_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b7a.bin
2c0b439766baf5d68b7cc6949fdaa537d876ee8f304be815b252bb65ee768ece		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B7A 22512 bytes
font_01_sfnt_off00005dc7.bin
5659d9888582062508267ebbf63009ab290552e6e58b6f7858eb28921dafe03f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC7 19552 bytes

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