Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb0e4df3d83fa6b…

MALICIOUS

PDF

51.0 KB Created: 2021-05-13 10:32:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b731e0a662ba64141921a8d2fddd80e0 SHA-1: 752b0aa00226245cff4fd86cc5cefb744d894a3f SHA-256: 6fb0e4df3d83fa6bbf143bd4253228eed524be5097dee9802b57f0efe2bc6be9
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that point to known malicious redirector infrastructure, specifically advertising free Robux and game hacks. The ML classifier also flagged this PDF as malicious with high confidence. The document body and embedded links suggest a lure to download further malicious content, likely a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9348

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.xyz/app/431946152/roblox36.com-free-robux-game-hack In PDF document text
    • http://dermaceutic.co.uk/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/free-pe_GM479516143.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/coin-spin_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dermaceutic.co.uk/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CEE 27028 bytes
SHA-256: b2e33b2fed62a622a5b33cb247edfd5b16a94c1da0b92b4a1f8738541bab8b3c
font_01_sfnt_off00008b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B53 7420 bytes
SHA-256: 0b188308ab0e7ffce9913d63d697a586f2937cafc51a771db38e3a566cd37e24
font_02_sfnt_off0000a3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C3 18756 bytes
SHA-256: 75a7293df35b739ae2294dba45007dab7b7658b4df7c6a7e046c10781a1fd260

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