Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b8264d2055d368c…

MALICIOUS

PDF

35.0 KB Created: 2021-06-25 07:00:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 27c83439408864bc5f74d6d03990549f SHA-1: e70b114e034320612912e649b65e3b0581d629cb SHA-256: 1b8264d2055d368c285426bb37be2189b5a8104993a2e7b39408fe732f8d4340
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains numerous external links, many of which are presented as guides for game hacks and exploits, suggesting a lure to download malicious content. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of these links, and the 'SE_DOWNLOAD_BUTTON' heuristic suggests a call-to-action within the document. The ML classifier also strongly flagged this PDF as malicious.

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/how-to-steal-people-stuff-in-roblox-hacks-game-hack
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/dll-files-roblox-hack_GM431946152.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/minecraft-skins-free-girl_GM479516143.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/what-are-free-robux-codes_GM431946152.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-inspect_GM431946152.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/how-to-get-free-limiteds-on-roblox-2021_GM431946152.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/codes-to-get-free-robux_GM431946152.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/free-roblox-exploit-dll_GM431946152.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts_GM431946152.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/free-tiktok-likes-no-survey_GM835599320.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/one-for-all-roblox-free-shop-t-schirts_GM431946152.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/roblox-hacked-bloxy_GM431946152.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/free-robux-giveiaway-live_GM431946152.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/do-free-robux-websites-work_GM431946152.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/robux-fun-com-free-robux_GM431946152.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/roblox-hack-no-download-no-survey-no-password_GM431946152.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/free-minecraft-account_GM479516143.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-instagram_GM406889139.pdf
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/lazyblox-com-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000315b.bin
8222e8d5f17bc856dae9dda4b5f2979c71f3f446ac0a0445d096eb3852b8b924		 pdf-font-stream PDF embedded font (sfnt) at offset 0x315B 22256 bytes
font_01_sfnt_off000062b8.bin
7decb2421f93b7c2c1dbe74d6dbe5e7e8e40b6209af614629d3f9df453a09cce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B8 19392 bytes

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