Malicious PDF — malware analysis report

Static analysis result for SHA-256 a286c26b3ee0650c…

MALICIOUS

PDF

47.0 KB Created: 2021-06-09 15:04:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e878a6fed366c46b6f80a28fd95927cf SHA-1: 552a3a3fd309b4c7a7c8fac62148257fc1b4ae10 SHA-256: a286c26b3ee0650c57266899a2585ed9ba214d3519bda260a0fb4754cbe3e698
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF link farms. The primary lure appears to be 'free Robux' for Roblox, a common theme in scams. The document body, though heavily obfuscated, contains references to these lures and URLs. The presence of embedded links and the overall structure strongly suggest a phishing or scam attempt designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/ho-to-get-free-robux-in-roblox-game-hack
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/free-robux-no-gift-card_GM431946152.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021-today_GM406889139.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-free_GM431946152.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/roblox-jailbreak-hack-download_GM431946152.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/tiktok-free-view-iphone-keychain_GM835599320.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/coin-master-free-coin-hack_GM406889139.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/free-cracked-minecraft-server-hosting_GM479516143.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/today-free-spin-coin-master_GM406889139.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/coin-master-club-hack_GM406889139.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/pokemon-go-free-leafeon_GM1094591345.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/earn-free-robux-on-roblox_GM431946152.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/facebook-coin-master-hack_GM406889139.pdf
    • http://e.mandacianjur.sch.id/__statics/gudangsoal/files/how-do-you-hack-minecraft_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005049.bin
eb053db894eb2d71f4c6b623223161c170cce15f9448e0b54aa7f8a28bd836f1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5049 24652 bytes
font_01_sfnt_off00008889.bin
9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8889 5596 bytes
font_02_sfnt_off00009530.bin
52fda1c49622cc54cef671a6f045aae3091740b69e66917c3439b4e05cedf2e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9530 18192 bytes

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