Malicious PDF — malware analysis report

Static analysis result for SHA-256 06201eed9e2d5642…

MALICIOUS

PDF

36.1 KB Created: 2021-07-05 12:47:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1858670ec25ca1a05f5e71a7de513570 SHA-1: 536cb80cb9d568845f1dc7f1168b54647c5f505b SHA-256: 06201eed9e2d564229262de2c9118bea6135f3435002154c975144ad0f299e71
142 Risk Score

Malware Insights

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

The PDF contains a launch action that directs the user to a URL promising "free Robux", and also exhibits a link farm heuristic pointing to numerous similar scam-related PDFs. The ML classifier strongly indicates maliciousness. The presence of a launch action and embedded URLs suggests an attempt to redirect the user to a malicious site, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Launch action high PDF_LAUNCH
    PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
  • 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/431946152/free-robux-that-actually-works-2021-game-hack
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021-pc_GM431946152.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-no-human-verification_GM406889139.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/coin-master-in-app-purchase-hack_GM406889139.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/roblox-robux-hack-walkthrough_GM431946152.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/sites-to-get-free-robux_GM431946152.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/oprewards-com-earn_GM431946152.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-offers_GM431946152.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/create-minecraft-server-free_GM479516143.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/launch-hack-roblox_GM431946152.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/pokemon-go-free-download-apk_GM1094591345.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/roblox-free-models_GM431946152.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/free-robux-cards_GM431946152.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-today_GM406889139.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/free-spin-coin-master-link-2021_GM406889139.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/i-got-hacked-on-roblox_GM431946152.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-apkmody_GM406889139.pdf
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-gift-cards-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003228.bin
62b3c7b79988796cb3969642b89fa3b0a799e3bd7855441dfe984f74e1e726d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3228 22712 bytes
font_01_sfnt_off0000650f.bin
8708610d65edee27054ce301a9bd75c7c559fd6231599c341fc0984ebcbede77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650F 20008 bytes

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