Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc631e05e5bd7f85…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 18:16:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b2753b32d6b326007cbd5bb46b38a81b SHA-1: c93cef235f0dbc4487b36346d02e802d50715da5 SHA-256: dc631e05e5bd7f85f7ce04281bfc1c5abf73145d1b61509c44ec1d3d40b58f3c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs that link to sites advertising game hacks and cheats, indicating a lure for users to download potentially malicious content. The ML classifier and PDF link farm heuristics strongly suggest malicious intent, likely to exploit users seeking unauthorized game advantages. No scripts were extracted from this sample.

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.tw/app/406889139/coin-master-hack-pc-cheat-engine-game-hack
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/roblox-free-robux-com_GM431946152.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/free-spins-on-coin-master-without-human-verification_GM406889139.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/robux-com-free-robux_GM431946152.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/minecraft-hacks-list_GM479516143.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/how-do-you-hack-on-jailbreak-in-roblox_GM431946152.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/free-robux-group-payouts_GM431946152.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/coin-master-free-spins-daily-link-updated_GM406889139.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/promo-codes-for-free-robux_GM431946152.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/coin-master-daily-free-spins_GM406889139.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/fb-coin-master-free-spins-link_GM406889139.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/free-spins-coin-master-haktuts_GM406889139.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/coin-master-online-hack-download_GM406889139.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/free-400-spins-coins-master_GM406889139.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/coin-master-support_GM406889139.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031fc.bin
7951ee12fbc37476d288d89601692343eb5dcaa8682e2cd78874291d7487f4e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31FC 22768 bytes
font_01_sfnt_off000064e1.bin
6d12a5e0eb98766e75a11546a2696c78e8e61564fc37edf79f652a555e1dad85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E1 18324 bytes

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