Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a3e15881ce6ed0…

MALICIOUS

PDF

46.5 KB Created: 2021-06-11 04:08:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ca81eef1208cb283e0ffa19116c799a3 SHA-1: e7fb9b69a2f26290eee80a3b57ede28dc485d88e SHA-256: 93a3e15881ce6ed09bbea5eb79487a096e6583328f9f3a3abf61aa17667234f0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game-related cheats and hacks. The document body and extracted URLs strongly suggest a lure for users seeking free in-game currency or exploits. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the presence of many external links indicates a potential for downloading further malicious content or redirecting to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.tw/app/431946152/how-to-get-free-robux-not-downloads-game-hack
    • http://stitqi.ac.id/website/repository/robux-hack-sin-verificacion_GM431946152.pdf
    • http://stitqi.ac.id/website//repository/earn-free-robux-for-roblox_GM431946152.pdf
    • http://stitqi.ac.id/website/repository/coin-master-app-free-download_GM406889139.pdf
    • http://stitqi.ac.id/website//repository/free-card-link-coin-master_GM406889139.pdf
    • http://stitqi.ac.id/website//repository/watch-videos-for-robux_GM431946152.pdf
    • http://stitqi.ac.id/website//repository/coin-master-free-spins-link-download-today_GM406889139.pdf
    • http://stitqi.ac.id/website/repository/coin-master-hack-no-verification_GM406889139.pdf
    • http://stitqi.ac.id/website/repository/collect-free-spin-linms-coin-master_GM406889139.pdf
    • http://stitqi.ac.id/website/repository/free-running-in-parkour-roblox_GM431946152.pdf
    • http://stitqi.ac.id/website//repository/minecraft-free-school_GM479516143.pdf
    • http://stitqi.ac.id/website/repository/roblox-hacks-rape_GM431946152.pdf
    • http://stitqi.ac.id/website/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • http://stitqi.ac.id/website//repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdf
    • http://stitqi.ac.id/website//repository/coin-master-hack-tool-no-human-verification_GM406889139.pdf
    • http://stitqi.ac.id/website/repository/where-to-get-free-robux_GM431946152.pdf
    • http://stitqi.ac.id/website//repository/free-robux-no-apps_GM431946152.pdf
    • http://stitqi.ac.id/website/repository/cheat-code-bubble-gum-simulator-roblox_GM431946152.pdf
    • http://stitqi.ac.id/website/repository/free-robux-with-no-survey_GM431946152.pdf
    • http://stitqi.ac.id/website/repository/robux-money_GM431946152.pdf
    • http://stitqi.ac.id/website/repository/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ee3.bin
680f0438d30a89eebd64f413bcddd96779704f7048d735fca7cfc53d59fe3689		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE3 24468 bytes
font_01_sfnt_off000086bf.bin
dcdd98ee8e25436a83587ccb4027347dd2c3fcec95f3413942edd4086125bcca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86BF 2888 bytes
font_02_sfnt_off00009093.bin
5e99945f9d14d8f1b28a6a98cd2d59a54d7ccd28ccc5edbd9f41b0ac4a92143f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9093 18924 bytes

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