Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b7c321d7d6e60c…

MALICIOUS

PDF

34.1 KB Created: 2021-06-28 07:51:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 582ba40fa0713b66ca54caba1596a9d0 SHA-1: 083783d930cd2207dfce0b123f5906f1187ab8b1 SHA-256: 11b7c321d7d6e60c61067a278220995c01be616333938a04831e905e18b4f258
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are presented as 'free game hacks' or 'cheats' for popular games like Roblox and Minecraft. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users. The ML classifier also strongly flagged this PDF as malicious. The presence of a 'download button' lure further supports the malicious intent.

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/hack-of-roblox-game-hack
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-roblox-adopt-me-accounts_GM431946152.pdf
    • http://perpus.unbi.ac.id/slims7_cendana/repository/roblox-hack-steal-robux_GM431946152.pdf
    • http://perpus.unbi.ac.id/slims7_cendana/repository/como-tener-robux-sin-hacks_GM431946152.pdf
    • http://perpus.unbi.ac.id/slims7_cendana//repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdf
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-to-get-free-robux-easy-on-chromebook_GM431946152.pdf
    • http://perpus.unbi.ac.id/slims7_cendana//repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • http://perpus.unbi.ac.id/slims7_cendana//repository/coinmaster-blogspot_GM406889139.pdf
    • http://perpus.unbi.ac.id/slims7_cendana//repository/get-free-spins-in-coin-master_GM406889139.pdf
    • http://perpus.unbi.ac.id/slims7_cendana/repository/get-free-coin-master_GM406889139.pdf
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-to-hack-other-roblox-accounts-2021_GM431946152.pdf
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-to-get-free-robux-gift-card-codes_GM431946152.pdf
    • http://perpus.unbi.ac.id/slims7_cendana//repository/minecraft-hack-download_GM479516143.pdf
    • http://perpus.unbi.ac.id/slims7_cendana//repository/coin-master-free-spins-2021-hack_GM406889139.pdf
    • http://perpus.unbi.ac.id/slims7_cendana//repository/como-hackear-coin-master-gratis_GM406889139.pdf
    • http://perpus.unbi.ac.id/slims7_cendana//repository/how-you-get-free-robux_GM431946152.pdf
    • http://perpus.unbi.ac.id/slims7_cendana//repository/coin-master-free-coins-and-spins-link-2021_GM406889139.pdf
    • http://perpus.unbi.ac.id/slims7_cendana//repository/hack-coin-master-no-survey_GM406889139.pdf
    • http://perpus.unbi.ac.id/slims7_cendana//repository/coin-master-free-spins-facebook_GM406889139.pdf
    • http://perpus.unbi.ac.id/slims7_cendana//repository/real-hack-for-coin-master_GM406889139.pdf
    • http://perpus.unbi.ac.id/slims7_cendana/repository/easy-robux-today_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fa7.bin
7c9540481d8c31f0d1d518eea7c2f100588e46b535b24b4e8d49de4327b93a4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA7 22184 bytes
font_01_sfnt_off00006138.bin
bf9c36f3ce15f44845f0b9f96c1db4be44c8b2546c12ba561f9e28181fc16c9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6138 18656 bytes

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